diff --git a/frontend/src/components/common/account.js b/frontend/src/components/common/account.js
index cfad00b5cf..5e9431561c 100644
--- a/frontend/src/components/common/account.js
+++ b/frontend/src/components/common/account.js
@@ -122,7 +122,7 @@ class Account extends Component {
         };
       } else if (isOrgStaff) {
         data = {
-          url: `${siteRoot}org/useradmin/`,
+          url: `${siteRoot}org/info/`,
           text: gettext('Organization Admin')
         };
       } else if (isInstAdmin) {
diff --git a/frontend/src/components/dialog/org-import-users-dialog.js b/frontend/src/components/dialog/org-import-users-dialog.js
new file mode 100644
index 0000000000..acadd65037
--- /dev/null
+++ b/frontend/src/components/dialog/org-import-users-dialog.js
@@ -0,0 +1,67 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import { Alert, Modal, ModalHeader, ModalBody, ModalFooter, Button } from 'reactstrap';
+import { gettext, siteRoot } from '../../utils/constants';
+
+const propTypes = {
+  toggle: PropTypes.func.isRequired,
+  importUsersInBatch: PropTypes.func.isRequired,
+};
+
+class ImportOrgUsersDialog extends React.Component {
+  constructor(props) {
+    super(props);
+    this.fileInputRef = React.createRef();
+    this.state = {
+      errorMsg: ''
+    };
+  }
+
+  toggle = () => {
+    this.props.toggle();
+  }
+
+  openFileInput = () => {
+    this.fileInputRef.current.click();
+  }
+
+  uploadFile = (e) => {
+    // no file selected
+    if (!this.fileInputRef.current.files.length) {
+      return;
+    }
+    // check file extension
+    let fileName = this.fileInputRef.current.files[0].name;
+    if(fileName.substr(fileName.lastIndexOf('.') + 1) != 'xlsx') {
+      this.setState({
+        errorMsg: gettext('Please choose a .xlsx file.')
+      });
+      return;
+    }
+    const file = this.fileInputRef.current.files[0];
+    this.props.importUsersInBatch(file);
+    this.toggle();
+  }
+
+  render() {
+    let { errorMsg } = this.state;
+    return (
+      <Modal isOpen={true} toggle={this.toggle}>
+        <ModalHeader toggle={this.toggle}>{gettext('Import users from a .xlsx file')}</ModalHeader>
+        <ModalBody>
+          <p><a className="text-secondary small" href={`${siteRoot}useradmin/batchadduser/example/`}>{gettext('Download an example file')}</a></p>
+          <button className="btn btn-outline-primary" onClick={this.openFileInput}>{gettext('Upload file')}</button>
+          <input className="d-none" type="file" onChange={this.uploadFile} ref={this.fileInputRef} />
+          {errorMsg && <Alert color="danger">{errorMsg}</Alert>}
+        </ModalBody>
+        <ModalFooter>
+          <Button color="secondary" onClick={this.toggle}>{gettext('Cancel')}</Button>
+        </ModalFooter>
+      </Modal>
+    );
+  }
+}
+
+ImportOrgUsersDialog.propTypes = propTypes;
+
+export default ImportOrgUsersDialog;
diff --git a/frontend/src/pages/org-admin/devices/desktop-devices.js b/frontend/src/pages/org-admin/devices/desktop-devices.js
new file mode 100644
index 0000000000..47ce6a20d3
--- /dev/null
+++ b/frontend/src/pages/org-admin/devices/desktop-devices.js
@@ -0,0 +1,29 @@
+import React, { Component, Fragment } from 'react';
+import DevicesNav from './devices-nav';
+import DevicesByPlatform from './devices-by-platform';
+import MainPanelTopbar from '../main-panel-topbar';
+
+class OrgDesktopDevices extends Component {
+
+  constructor(props) {
+    super(props);
+  }
+
+  render() {
+    return (
+      <Fragment>
+        <MainPanelTopbar />
+        <div className="main-panel-center flex-row">
+          <div className="cur-view-container">
+            <DevicesNav currentItem="desktop" />
+            <DevicesByPlatform
+              devicesPlatform={'desktop'}
+            />
+          </div>
+        </div>
+      </Fragment>
+    );
+  }
+}
+
+export default OrgDesktopDevices;
diff --git a/frontend/src/pages/org-admin/devices/devices-by-platform.js b/frontend/src/pages/org-admin/devices/devices-by-platform.js
new file mode 100644
index 0000000000..691a2cb50d
--- /dev/null
+++ b/frontend/src/pages/org-admin/devices/devices-by-platform.js
@@ -0,0 +1,216 @@
+import React, { Component, Fragment } from 'react';
+import { seafileAPI } from '../../../utils/seafile-api';
+import { orgID, gettext } from '../../../utils/constants';
+import toaster from '../../../components/toast';
+import { Utils } from '../../../utils/utils';
+import EmptyTip from '../../../components/empty-tip';
+import moment from 'moment';
+import Loading from '../../../components/loading';
+import Paginator from '../../../components/paginator';
+import SysAdminUnlinkDevice from '../../../components/dialog/sysadmin-dialog/sysadmin-unlink-device-dialog';
+
+class Content extends Component {
+
+  constructor(props) {
+    super(props);
+  }
+
+  getPreviousPageDevicesList = () => {
+    this.props.getDevicesListByPage(this.props.pageInfo.current_page - 1);
+  }
+
+  getNextPageDevicesList = () => {
+    this.props.getDevicesListByPage(this.props.pageInfo.current_page + 1);
+  }
+
+  render() {
+    const { loading, errorMsg, items, pageInfo, curPerPage } = this.props;
+    if (loading) {
+      return <Loading />;
+    } else if (errorMsg) {
+      return <p className="error text-center">{errorMsg}</p>;
+    } else {
+      const emptyTip = (
+        <EmptyTip>
+          <h2>{gettext('No connected devices')}</h2>
+        </EmptyTip>
+      );
+      const table = (
+        <Fragment>
+          <table className="table-hover">
+            <thead>
+              <tr>
+                <th width="19%">{gettext('User')}</th>
+                <th width="19%">{gettext('Platform')}{' / '}{gettext('Version')}</th>
+                <th width="19%">{gettext('Device Name')}</th>
+                <th width="19%">{gettext('IP')}</th>
+                <th width="19%">{gettext('Last Access')}</th>
+                <th width="5%">{/*Operations*/}</th>
+              </tr>
+            </thead>
+            <tbody>
+              {items.map((item, index) => {
+                return (<Item key={index} item={item} />);
+              })}
+            </tbody>
+          </table>
+          <Paginator
+            gotoPreviousPage={this.getPreviousPageDevicesList}
+            gotoNextPage={this.getNextPageDevicesList}
+            currentPage={pageInfo.current_page}
+            hasNextPage={pageInfo.has_next_page}
+            curPerPage={curPerPage}
+            resetPerPage={this.props.resetPerPage}
+          />
+        </Fragment>
+      );
+
+      return items.length ? table : emptyTip;
+    }
+  }
+}
+
+class Item extends Component {
+
+  constructor(props) {
+    super(props);
+    this.state = {
+      unlinked: false,
+      isOpIconShown: false,
+      isUnlinkDeviceDialogOpen: false
+    };
+  }
+
+  handleMouseOver = () => {
+    this.setState({isOpIconShown: true});
+  }
+
+  handleMouseOut = () => {
+    this.setState({isOpIconShown: false});
+  }
+
+  handleUnlink = (e) => {
+    e.preventDefault();
+    if (this.props.item.is_desktop_client) {
+      this.toggleUnlinkDeviceDialog();
+    } else {
+      this.unlinkDevice(true);
+    }
+  }
+
+  toggleUnlinkDeviceDialog = () => {
+    this.setState({isUnlinkDeviceDialogOpen: !this.state.isUnlinkDeviceDialogOpen});
+  }
+
+  unlinkDevice = (deleteFiles) => {
+    const { platform, device_id, user } = this.props.item;
+    seafileAPI.orgAdminUnlinkDevice(orgID, platform, device_id, user, deleteFiles).then((res) => {
+      this.setState({unlinked: true});
+      let message = gettext('Successfully unlinked the device.');
+      toaster.success(message);
+    }).catch((error) => {
+      let errMessage = Utils.getErrorMsg(error);
+      toaster.danger(errMessage);
+    });
+  }
+
+  render() {
+    const item = this.props.item;
+    const { unlinked, isUnlinkDeviceDialogOpen, isOpIconShown } = this.state;
+
+    if (unlinked) {
+      return null;
+    }
+
+    return (
+      <Fragment>
+        <tr onMouseEnter={this.handleMouseOver} onMouseLeave={this.handleMouseOut}>
+          <td>{item.user_name}</td>
+          <td>{item.platform}{' / '}{item.client_version}</td>
+          <td>{item.device_name}</td>
+          <td>{item.last_login_ip}</td>
+          <td>
+            <span title={moment(item.last_accessed).format('llll')}>{moment(item.last_accessed).fromNow()}</span>
+          </td>
+          <td>
+            <a href="#" className={`sf2-icon-delete action-icon ${isOpIconShown ? '' : 'invisible'}`} title={gettext('Unlink')} onClick={this.handleUnlink}></a>
+          </td>
+        </tr>
+        {isUnlinkDeviceDialogOpen &&
+          <SysAdminUnlinkDevice
+            unlinkDevice={this.unlinkDevice}
+            toggleDialog={this.toggleUnlinkDeviceDialog}
+          />
+        }
+      </Fragment>
+    );
+  }
+}
+
+class DevicesByPlatform extends Component {
+
+  constructor(props) {
+    super(props);
+    this.state = {
+      loading: true,
+      errorMsg: '',
+      devicesData: {},
+      pageInfo: {},
+      perPage: 25
+    };
+  }
+
+  componentDidMount () {
+    let urlParams = (new URL(window.location)).searchParams;
+    const { currentPage = 1, perPage } = this.state;
+    this.setState({
+      perPage: parseInt(urlParams.get('per_page') || perPage),
+      currentPage: parseInt(urlParams.get('page') || currentPage)
+    }, () => {
+      this.getDevicesListByPage(this.state.currentPage);
+    });
+  }
+
+  getDevicesListByPage = (page) => {
+    let platform = this.props.devicesPlatform;
+    let per_page = this.state.perPage;
+    seafileAPI.orgAdminListDevices(orgID, platform, page, per_page).then((res) => {
+      this.setState({
+        devicesData: res.data.devices,
+        pageInfo: res.data.page_info,
+        loading: false
+      });
+    }).catch((error) => {
+      this.setState({
+        loading: false,
+        errorMsg: Utils.getErrorMsg(error, true) // true: show login tip if 403
+      });
+    });
+  }
+
+  resetPerPage = (perPage) => {
+    this.setState({
+      perPage: perPage
+    }, () => {
+      this.getDevicesListByPage(1);
+    });
+  }
+
+  render() {
+    return (
+      <div className="cur-view-content">
+        <Content
+          loading={this.state.loading}
+          errorMsg={this.state.errorMsg}
+          items={this.state.devicesData}
+          getDevicesListByPage={this.getDevicesListByPage}
+          curPerPage={this.state.perPage}
+          resetPerPage={this.resetPerPage}
+          pageInfo={this.state.pageInfo}
+        />
+      </div>
+    );
+  }
+}
+
+export default DevicesByPlatform;
diff --git a/frontend/src/pages/org-admin/devices/devices-errors.js b/frontend/src/pages/org-admin/devices/devices-errors.js
new file mode 100644
index 0000000000..cecf5f459f
--- /dev/null
+++ b/frontend/src/pages/org-admin/devices/devices-errors.js
@@ -0,0 +1,204 @@
+import React, { Component, Fragment } from 'react';
+import { Button } from 'reactstrap';
+import { seafileAPI } from '../../../utils/seafile-api';
+import { siteRoot, gettext, orgID } from '../../../utils/constants';
+import toaster from '../../../components/toast';
+import { Utils } from '../../../utils/utils';
+import EmptyTip from '../../../components/empty-tip';
+import moment from 'moment';
+import Loading from '../../../components/loading';
+import { Link } from '@reach/router';
+import DevicesNav from './devices-nav';
+import MainPanelTopbar from '../main-panel-topbar';
+import UserLink from '../user-link';
+import Paginator from '../../../components/paginator';
+
+class Content extends Component {
+
+  constructor(props) {
+    super(props);
+  }
+
+  getPreviousPageDeviceErrorsList = () => {
+    this.props.getDeviceErrorsListByPage(this.props.pageInfo.current_page - 1);
+  }
+
+  getNextPageDeviceErrorsList = () => {
+    this.props.getDeviceErrorsListByPage(this.props.pageInfo.current_page + 1);
+  }
+
+  render() {
+    const { loading, errorMsg, items, pageInfo, curPerPage } = this.props;
+    if (loading) {
+      return <Loading />;
+    } else if (errorMsg) {
+      return <p className="error text-center">{errorMsg}</p>;
+    } else {
+      const emptyTip = (
+        <EmptyTip>
+          <h2>{gettext('No sync errors')}</h2>
+        </EmptyTip>
+      );
+      const table = (
+        <Fragment>
+          <table className="table-hover">
+            <thead>
+              <tr>
+                <th width="16%">{gettext('User')}</th>
+                <th width="20%">{gettext('Device')}{' / '}{gettext('Version')}</th>
+                <th width="16%">{gettext('IP')}</th>
+                <th width="16%">{gettext('Library')}</th>
+                <th width="16%">{gettext('Error')}</th>
+                <th width="16%">{gettext('Time')}</th>
+              </tr>
+            </thead>
+            <tbody>
+              {items.map((item, index) => {
+                return (<Item key={index} item={item} />);
+              })}
+            </tbody>
+          </table>
+          <Paginator
+            gotoPreviousPage={this.getPreviousPageDeviceErrorsList}
+            gotoNextPage={this.getNextPageDeviceErrorsList}
+            currentPage={pageInfo.current_page}
+            hasNextPage={pageInfo.has_next_page}
+            curPerPage={curPerPage}
+            resetPerPage={this.props.resetPerPage}
+          />
+        </Fragment>
+      );
+      return items.length ? table : emptyTip;
+    }
+  }
+}
+
+class Item extends Component {
+
+  constructor(props) {
+    super(props);
+    this.state = {
+      isOpIconShown: false,
+    };
+  }
+
+  handleMouseOver = () => {
+    this.setState({isOpIconShown: true});
+  }
+
+  handleMouseOut = () => {
+    this.setState({isOpIconShown: false});
+  }
+
+  render() {
+    let item = this.props.item;
+    return (
+      <tr onMouseEnter={this.handleMouseOver} onMouseLeave={this.handleMouseOut}>
+        <td><UserLink email={item.email} name={item.name} /></td>
+        <td>{item.device_name}{' / '}{item.client_version}</td>
+        <td>{item.device_ip}</td>
+        <td><Link to={`${siteRoot}sysadmin/#libs/${item.repo_id}`}>{item.repo_name}</Link></td>
+        <td>{item.error_msg}</td>
+        <td>
+          <span className="item-meta-info" title={moment(item.last_accessed).format('llll')}>{moment(item.error_time).fromNow()}</span>
+        </td>
+      </tr>
+    );
+  }
+}
+
+class OrgDevicesErrors extends Component {
+
+  constructor(props) {
+    super(props);
+    this.state = {
+      loading: true,
+      errorMsg: '',
+      devicesErrors: [],
+      isCleanBtnShown: false,
+      pageInfo: {},
+      perPage: 25
+    };
+  }
+
+  componentDidMount () {
+    let urlParams = (new URL(window.location)).searchParams;
+    const { currentPage = 1, perPage } = this.state;
+    this.setState({
+      perPage: parseInt(urlParams.get('per_page') || perPage),
+      currentPage: parseInt(urlParams.get('page') || currentPage)
+    }, () => {
+      this.getDeviceErrorsListByPage(this.state.currentPage);
+    });
+  }
+
+  getDeviceErrorsListByPage = (page) => {
+    let per_page = this.state.perPage;
+    seafileAPI.orgAdminListDevicesErrors(orgID, page, per_page).then((res) => {
+      this.setState({
+        loading: false,
+        devicesErrors: res.data.device_errors,
+        pageInfo: res.data.page_info,
+        isCleanBtnShown: res.data.length > 0
+      });
+    }).catch((error) => {
+      this.setState({
+        loading: false,
+        errorMsg: Utils.getErrorMsg(error, true) // true: show login tip if 403
+      });
+    });
+  }
+
+  clean = () => {
+    seafileAPI.sysAdminClearDeviceErrors().then((res) => {
+      this.setState({
+        devicesErrors: [],
+        isCleanBtnShown: false
+      });
+      let message = gettext('Successfully cleaned all errors.');
+      toaster.success(message);
+    }).catch((error) => {
+      let errMessage = Utils.getErrorMsg(error);
+      toaster.danger(errMessage);
+    });
+  }
+
+  resetPerPage = (perPage) => {
+    this.setState({
+      perPage: perPage
+    }, () => {
+      this.getDeviceErrorsListByPage(1);
+    });
+  }
+  render() {
+    return (
+      <Fragment>
+        {this.state.isCleanBtnShown ? (
+          <MainPanelTopbar>
+            <Button className="operation-item" onClick={this.clean}>{gettext('Clean')}</Button>
+          </MainPanelTopbar>
+        ) : (
+          <MainPanelTopbar />
+        )}
+        <div className="main-panel-center flex-row">
+          <div className="cur-view-container">
+            <DevicesNav currentItem="errors" />
+            <div className="cur-view-content">
+              <Content
+                loading={this.state.loading}
+                errorMsg={this.state.errorMsg}
+                items={this.state.devicesErrors}
+                getDeviceErrorsListByPage={this.getDeviceErrorsListByPage}
+                curPerPage={this.state.perPage}
+                resetPerPage={this.resetPerPage}
+                pageInfo={this.state.pageInfo}
+              />
+            </div>
+          </div>
+        </div>
+      </Fragment>
+    );
+  }
+}
+
+export default OrgDevicesErrors;
diff --git a/frontend/src/pages/org-admin/devices/devices-nav.js b/frontend/src/pages/org-admin/devices/devices-nav.js
new file mode 100644
index 0000000000..263690a592
--- /dev/null
+++ b/frontend/src/pages/org-admin/devices/devices-nav.js
@@ -0,0 +1,41 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import { Link } from '@reach/router';
+import { siteRoot, gettext } from '../../../utils/constants';
+
+const propTypes = {
+  currentItem: PropTypes.string.isRequired
+};
+
+class Nav extends React.Component {
+
+  constructor(props) {
+    super(props);
+    this.navItems = [
+      {name: 'desktop', urlPart:'desktop-devices', text: gettext('Desktop')},
+      {name: 'mobile', urlPart:'mobile-devices', text: gettext('Mobile')},
+      {name: 'errors', urlPart:'devices-errors', text: gettext('Errors')}
+    ];
+  }
+
+  render() {
+    const { currentItem } = this.props;
+    return (
+      <div className="cur-view-path tab-nav-container">
+        <ul className="nav">
+          {this.navItems.map((item, index) => {
+            return (
+              <li className="nav-item" key={index}>
+                <Link to={`${siteRoot}org/deviceadmin/${item.urlPart}/`} className={`nav-link${currentItem == item.name ? ' active' : ''}`}>{item.text}</Link>
+              </li>
+            );
+          })}
+        </ul>
+      </div>
+    );
+  }
+}
+
+Nav.propTypes = propTypes;
+
+export default Nav;
diff --git a/frontend/src/pages/org-admin/devices/mobile-devices.js b/frontend/src/pages/org-admin/devices/mobile-devices.js
new file mode 100644
index 0000000000..41a9f4d2c6
--- /dev/null
+++ b/frontend/src/pages/org-admin/devices/mobile-devices.js
@@ -0,0 +1,29 @@
+import React, { Component, Fragment } from 'react';
+import DevicesNav from './devices-nav';
+import DevicesByPlatform from './devices-by-platform';
+import MainPanelTopbar from '../main-panel-topbar';
+
+class MobileDevices extends Component {
+
+  constructor(props) {
+    super(props);
+  }
+
+  render() {
+    return (
+      <Fragment>
+        <MainPanelTopbar />
+        <div className="main-panel-center flex-row">
+          <div className="cur-view-container">
+            <DevicesNav currentItem="mobile" />
+            <DevicesByPlatform
+              devicesPlatform={'mobile'}
+            />
+          </div>
+        </div>
+      </Fragment>
+    );
+  }
+}
+
+export default MobileDevices;
diff --git a/frontend/src/pages/org-admin/index.js b/frontend/src/pages/org-admin/index.js
index af3d949776..c039c5f699 100644
--- a/frontend/src/pages/org-admin/index.js
+++ b/frontend/src/pages/org-admin/index.js
@@ -3,6 +3,15 @@ import ReactDOM from 'react-dom';
 import { Router } from '@reach/router';
 import { siteRoot } from '../../utils/constants';
 import SidePanel from './side-panel';
+
+import OrgStatisticFile from './statistic/statistic-file';
+import OrgStatisticStorage from './statistic/statistic-storage';
+import OrgStatisticTraffic from './statistic/statistic-traffic';
+import OrgStatisticUsers from './statistic/statistic-users';
+import OrgStatisticReport from './statistic/statistic-reports';
+import OrgDesktopDevices from './devices/desktop-devices.js';
+import OrgMobileDevices from './devices/mobile-devices.js';
+import OrgDevicesErrors from './devices/devices-errors.js';
 import OrgUsers from './org-users-users';
 import OrgUsersSearchUsers from './org-users-search-users';
 import OrgAdmins from './org-users-admins';
@@ -44,6 +53,12 @@ class Org extends React.Component {
     if (location.href.indexOf(`${siteRoot}org/useradmin`) != -1) {
       currentTab = 'users';
     }
+    if (location.href.indexOf(`${siteRoot}org/statistics-admin/`) != -1) {
+      currentTab = 'statistics-admin';
+    }
+    if (location.href.indexOf(`${siteRoot}org/deviceadmin/`) != -1) {
+      currentTab = 'deviceadmin';
+    }
     if (location.href.indexOf(`${siteRoot}org/groupadmin`) != -1) {
       currentTab = 'groupadmin';
     }
@@ -68,7 +83,15 @@ class Org extends React.Component {
         <SidePanel isSidePanelClosed={isSidePanelClosed} onCloseSidePanel={this.onCloseSidePanel} currentTab={currentTab} tabItemClick={this.tabItemClick}/>
         <div className="main-panel o-hidden">
           <Router className="reach-router">
-            <OrgInfo path={siteRoot + 'org/orgmanage'}/>
+            <OrgInfo path={siteRoot + 'org/info/'} />
+            <OrgStatisticFile path={siteRoot + 'org/statistics-admin/file/'} />
+            <OrgStatisticStorage path={siteRoot + 'org/statistics-admin/total-storage/'} />
+            <OrgStatisticUsers path={siteRoot + 'org/statistics-admin/active-users/'} />
+            <OrgStatisticTraffic path={siteRoot + 'org/statistics-admin/traffic/'} />
+            <OrgStatisticReport path={siteRoot + 'org/statistics-admin/reports/'} />
+            <OrgDesktopDevices path={siteRoot + 'org/deviceadmin/desktop-devices/'} />
+            <OrgMobileDevices path={siteRoot + 'org/deviceadmin/mobile-devices/'} />
+            <OrgDevicesErrors path={siteRoot + 'org/deviceadmin/devices-errors/'} />
             <OrgUsers path={siteRoot + 'org/useradmin'} />
             <OrgUsersSearchUsers path={siteRoot + 'org/useradmin/search-users'} />
             <OrgAdmins path={siteRoot + 'org/useradmin/admins/'} />
diff --git a/frontend/src/pages/org-admin/org-users-users.js b/frontend/src/pages/org-admin/org-users-users.js
index 4677fb0765..0ba5c2fe97 100644
--- a/frontend/src/pages/org-admin/org-users-users.js
+++ b/frontend/src/pages/org-admin/org-users-users.js
@@ -4,6 +4,7 @@ import Nav from './org-users-nav';
 import OrgUsersList from './org-users-list';
 import MainPanelTopbar from './main-panel-topbar';
 import ModalPortal from '../../components/modal-portal';
+import ImportOrgUsersDialog from '../../components/dialog/org-import-users-dialog';
 import AddOrgUserDialog from '../../components/dialog/org-add-user-dialog';
 import InviteUserDialog from '../../components/dialog/org-admin-invite-user-dialog';
 import toaster from '../../components/toast';
@@ -72,6 +73,7 @@ class OrgUsers extends Component {
       sortBy: '',
       sortOrder: 'asc',
       isShowAddOrgUserDialog: false,
+      isImportOrgUsersDialogOpen: false,
       isInviteUserDialogOpen: false
     };
   }
@@ -110,6 +112,10 @@ class OrgUsers extends Component {
     });
   }
 
+  toggleImportOrgUsersDialog = () => {
+    this.setState({isImportOrgUsersDialogOpen: !this.state.isImportOrgUsersDialogOpen});
+  }
+
   toggleAddOrgUser = () => {
     this.setState({isShowAddOrgUserDialog: !this.state.isShowAddOrgUserDialog});
   }
@@ -135,6 +141,30 @@ class OrgUsers extends Component {
     });
   }
 
+  importOrgUsers = (file) => {
+    toaster.notify(gettext('It may take some time, please wait.'));
+    seafileAPI.orgAdminImportUsersViaFile(orgID, file).then((res) => {
+      if (res.data.success.length) {
+        const users = res.data.success.map(item => {
+          if (item.institution == undefined) {
+            item.institution = '';
+          }
+          return new OrgUserInfo(item);
+        });
+        this.setState({
+          orgUsers: users.concat(this.state.orgUsers)
+        });
+      }
+      res.data.failed.map(item => {
+        const msg = `${item.email}: ${item.error_msg}`;
+        toaster.danger(msg);
+      });
+    }).catch((error) => {
+      let errMsg = Utils.getErrorMsg(error);
+      toaster.danger(errMsg);
+    });
+  }
+
   addOrgUser = (email, name, password) => {
     seafileAPI.orgAdminAddOrgUser(orgID, email, name, password).then(res => {
       let userInfo = new OrgUserInfo(res.data);
@@ -198,12 +228,18 @@ class OrgUsers extends Component {
     let topbarChildren;
     topbarChildren = (
       <Fragment>
-        <button className={topBtn} title={gettext('Add user')} onClick={this.toggleAddOrgUser}>
-          <i className="fas fa-plus-square text-secondary mr-1"></i>{gettext('Add user')}</button>
+        <button className="btn btn-secondary operation-item" onClick={this.toggleImportOrgUsersDialog}>{gettext('Import Users')}</button>
+        <button className={topBtn} title={gettext('Add User')} onClick={this.toggleAddOrgUser}>
+          <i className="fas fa-plus-square text-secondary mr-1"></i>{gettext('Add User')}</button>
         {invitationLink &&
         <button className={topBtn} title={gettext('Invite user')} onClick={this.toggleInviteUserDialog}>
           <i className="fas fa-plus-square text-secondary mr-1"></i>{gettext('Invite user')}</button>
         }
+        {this.state.isImportOrgUsersDialogOpen &&
+        <ModalPortal>
+          <ImportOrgUsersDialog importUsersInBatch={this.importOrgUsers} toggle={this.toggleImportOrgUsersDialog}/>
+        </ModalPortal>
+        }
         {this.state.isShowAddOrgUserDialog &&
         <ModalPortal>
           <AddOrgUserDialog handleSubmit={this.addOrgUser} toggle={this.toggleAddOrgUser}/>
diff --git a/frontend/src/pages/org-admin/side-panel.js b/frontend/src/pages/org-admin/side-panel.js
index 3e0943b7cf..8215371a3d 100644
--- a/frontend/src/pages/org-admin/side-panel.js
+++ b/frontend/src/pages/org-admin/side-panel.js
@@ -33,11 +33,23 @@ class SidePanel extends React.Component {
               <h3 className="sf-heading" style={{ 'color': '#f7941d' }}>{gettext('Admin')}</h3>
               <ul className="nav nav-pills flex-column nav-container">
                 <li className="nav-item">
-                  <Link className={`nav-link ellipsis ${this.getActiveClass('orgmanage')}`} to={siteRoot + 'org/orgmanage/'} onClick={() => this.tabItemClick('orgmanage')} >
+                  <Link className={`nav-link ellipsis ${this.getActiveClass('info')}`} to={siteRoot + 'org/info/'} onClick={() => this.tabItemClick('info')} >
                     <span className="sf2-icon-info"></span>
                     <span className="nav-text">{gettext('Info')}</span>
                   </Link>
                 </li>
+                <li className="nav-item">
+                  <Link className={`nav-link ellipsis ${this.getActiveClass('statistics-admin')}`} to={siteRoot + 'org/statistics-admin/file/'} onClick={() => this.tabItemClick('statistics-admin')} >
+                    <span className="sf2-icon-histogram"></span>
+                    <span className="nav-text">{gettext('Statistic')}</span>
+                  </Link>
+                </li>
+                <li className="nav-item">
+                  <Link className={`nav-link ellipsis ${this.getActiveClass('deviceadmin')}`} to={siteRoot + 'org/deviceadmin/desktop-devices/'} onClick={() => this.tabItemClick('deviceadmin')} >
+                    <span className="sf2-icon-monitor"></span>
+                    <span className="nav-text">{gettext('Devices')}</span>
+                  </Link>
+                </li>
                 <li className="nav-item">
                   <Link className={`nav-link ellipsis ${this.getActiveClass('repoadmin')}`} to={siteRoot + 'org/repoadmin/'} onClick={() => this.tabItemClick('repoadmin')} >
                     <span className="sf2-icon-library"></span>
diff --git a/frontend/src/pages/org-admin/statistic/picker.js b/frontend/src/pages/org-admin/statistic/picker.js
new file mode 100644
index 0000000000..d1836b4913
--- /dev/null
+++ b/frontend/src/pages/org-admin/statistic/picker.js
@@ -0,0 +1,66 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import moment from 'moment';
+import Calendar from '@seafile/seafile-calendar';
+import DatePicker from '@seafile/seafile-calendar/lib/Picker';
+import { translateCalendar } from '../../../utils/date-format-utils';
+
+import '@seafile/seafile-calendar/assets/index.css';
+
+const propsTypes = {
+  disabledDate: PropTypes.func.isRequired,
+  value: PropTypes.object,
+  onChange: PropTypes.func.isRequired,
+};
+
+const FORMAT = 'YYYY-MM-DD';
+
+class Picker extends React.Component {
+
+  constructor(props) {
+    super(props);
+    this.defaultCalendarValue = null;
+  }
+
+  componentDidMount() {
+    let lang = window.app.config.lang;
+    this.defaultCalendarValue = moment().locale(lang).clone();
+  }
+
+  render() {
+    const props = this.props;
+    const calendar = (<Calendar
+      defaultValue={this.defaultCalendarValue}
+      disabledDate={props.disabledDate}
+      format={FORMAT}
+      locale={translateCalendar()}
+    />);
+    return (
+      <DatePicker
+        calendar={calendar}
+        value={props.value}
+        onChange={props.onChange}
+      >
+        {
+          ({value}) => {
+            return (
+              <span>
+                <input
+                  placeholder="yyyy-mm-dd"
+                  tabIndex="-1"
+                  readOnly
+                  value={value && value.format(FORMAT) || ''}
+                  className="form-control system-statistic-input"
+                />
+              </span>
+            );
+          }
+        }
+      </DatePicker>
+    );
+  }
+}
+
+Picker.propsTypes = propsTypes;
+
+export default Picker;
diff --git a/frontend/src/pages/org-admin/statistic/statistic-chart.js b/frontend/src/pages/org-admin/statistic/statistic-chart.js
new file mode 100644
index 0000000000..463e31da82
--- /dev/null
+++ b/frontend/src/pages/org-admin/statistic/statistic-chart.js
@@ -0,0 +1,123 @@
+import React from 'react';
+import { Line } from 'react-chartjs-2';
+import PropTypes from 'prop-types';
+import { Utils } from '../../../utils/utils';
+
+const propTypes = {
+  labels: PropTypes.array.isRequired,
+  filesData: PropTypes.array.isRequired,
+  suggestedMaxNumbers: PropTypes.number.isRequired,
+  isLegendStatus: PropTypes.bool.isRequired,
+  chartTitle: PropTypes.string.isRequired,
+  isTitleCallback: PropTypes.bool,
+  isTicksCallback: PropTypes.bool,
+};
+
+class StatisticChart extends React.Component {
+
+  constructor(props) {
+    super(props);
+    this.state = {
+      data: {},
+      opations: {}
+    };
+  }
+
+  componentDidMount() {
+    let { labels, filesData, isTitleCallback, isTicksCallback, suggestedMaxNumbers, isLegendStatus, chartTitle } = this.props;
+    let _this = this;
+    let data = {
+      labels: labels,
+      datasets: filesData
+    };
+    let options = {
+      title: {
+        display: true,
+        fontSize: 14,
+        text: chartTitle,
+      },
+      elements: {
+        line: {
+          fill: false,
+          tension: 0, // disable bezier curves, i.e, draw straight lines
+          borderWidth: 2
+        }
+      },
+      legend: {
+        display: isLegendStatus,
+        labels: {
+          usePointStyle: true
+        }
+      },
+      tooltips: {
+        callbacks: {
+          label: function(tooltipItem, data) {
+            if (isTitleCallback) {
+              return _this.titleCallback(tooltipItem, data);
+            }
+            return data.datasets[tooltipItem.datasetIndex].label + ': ' + tooltipItem.yLabel;
+          }
+        }
+      },
+      layout: {
+        padding: {
+          right: 100,
+        }
+      },
+      scales: {
+        yAxes: [{
+          ticks: {
+            beginAtZero: true,
+            suggestedMax: suggestedMaxNumbers,
+            callback: function(value, index, values) {
+              if (isTicksCallback) {
+                return _this.ticksCallback(value, index, values);
+              }
+              return value;
+            }
+          }
+        }],
+        xAxes: [{
+          ticks: {
+            maxTicksLimit: 20
+          }
+        }]
+      }
+    };
+    this.setState({
+      data: data,
+      options: options
+    });
+  }
+
+  componentWillReceiveProps(nextProps) {
+    let data = {
+      labels: nextProps.labels,
+      datasets: nextProps.filesData
+    };
+    this.setState({data: data});
+  }
+
+  titleCallback = (tooltipItem, data) => {
+    return data.datasets[tooltipItem.datasetIndex].label + ': ' + Utils.bytesToSize(tooltipItem.yLabel);
+  }
+
+  ticksCallback = (value, index, values) => {
+    return Utils.bytesToSize(value);
+  }
+
+  render() {
+
+    let { data, options } = this.state;
+    return (
+      <Line
+        data={data}
+        options={options}
+      />
+    );
+  }
+}
+
+StatisticChart.propTypes = propTypes;
+
+export default StatisticChart;
diff --git a/frontend/src/pages/org-admin/statistic/statistic-common-tool.js b/frontend/src/pages/org-admin/statistic/statistic-common-tool.js
new file mode 100644
index 0000000000..033acae1c8
--- /dev/null
+++ b/frontend/src/pages/org-admin/statistic/statistic-common-tool.js
@@ -0,0 +1,138 @@
+import React, { Fragment } from 'react';
+import PropTypes from 'prop-types';
+import { Button } from 'reactstrap';
+import moment from 'moment';
+import { gettext } from '../../../utils/constants';
+import Picker from './picker';
+
+const propTypes = {
+  getActiviesFiles: PropTypes.func.isRequired,
+  children: PropTypes.object,
+};
+
+class StatisticCommonTool extends React.Component {
+
+  constructor(props) {
+    super(props);
+    this.state = {
+      statisticType: 'oneWeek',
+      startValue: null,
+      endValue: null,
+    };
+  }
+
+  componentDidMount() {
+    let today = moment().format('YYYY-MM-DD 00:00:00');
+    let endTime = today;
+    let startTime = moment().subtract(6,'d').format('YYYY-MM-DD 00:00:00');
+    let group_by = 'day';
+    this.props.getActiviesFiles(startTime, endTime, group_by);
+  }
+
+  changeActive = (statisticTypeName) => {
+    let { statisticType } = this.state;
+    if (statisticType === statisticTypeName) {
+      return;
+    }
+    let today = moment().format('YYYY-MM-DD 00:00:00');
+    let endTime = today;
+    let startTime;
+    switch(statisticTypeName) {
+      case 'oneWeek' :
+        startTime = moment().subtract(6,'d').format('YYYY-MM-DD 00:00:00');
+        break;
+      case 'oneMonth' :
+        startTime = moment().subtract(29,'d').format('YYYY-MM-DD 00:00:00');
+        break;
+      case 'oneYear' :
+        startTime = moment().subtract(364,'d').format('YYYY-MM-DD 00:00:00');
+        break;
+    }
+    this.setState({
+      statisticType: statisticTypeName,
+    });
+    let group_by = 'day';
+    this.props.getActiviesFiles(startTime, endTime, group_by);
+  }
+
+  disabledStartDate = (startValue) => {
+    if (!startValue) {
+      return false;
+    }
+    let today = moment().format();
+
+    const endValue = this.state.endValue;
+    if (!endValue) {
+      let startTime = moment(startValue).format();
+      return today < startTime;
+    }
+    return endValue.isBefore(startValue) || moment(startValue).format() > today;
+  }
+
+  disabledEndDate = (endValue) => {
+    if (!endValue) {
+      return false;
+    }
+    let today = moment().format();
+    const startValue = this.state.startValue;
+    if (!startValue) {
+      let endTime = moment(endValue).format();
+      return today < endTime;
+    }
+    return endValue.isBefore(startValue) || moment(endValue).format() > today;
+  }
+
+  onChange = (field, value) => {
+    this.setState({
+      [field]: value,
+    });
+  }
+
+  onSubmit = () => {
+    let { startValue, endValue } = this.state;
+    if(!startValue || !endValue) {
+      return;
+    }
+    this.setState({
+      statisticType: 'itemButton',
+    });
+    let startTime = moment(startValue).format('YYYY-MM-DD 00:00:00');
+    let endTime = moment(endValue).format('YYYY-MM-DD 00:00:00');
+    let group_by = 'day';
+    this.props.getActiviesFiles(startTime, endTime, group_by);
+  }
+
+  render() {
+    let { statisticType, endValue, startValue } = this.state;
+    return(
+      <Fragment>
+        {this.props.children}
+        <div className="system-statistic-time-range">
+          <div className="sys-stat-tool">
+            <div className={`system-statistic-item border-right-0 rounded-left ${statisticType === 'oneWeek' ? 'item-active' : ''}`} onClick={this.changeActive.bind(this, 'oneWeek')}>{gettext('7 Days')}</div>
+            <div className={`system-statistic-item border-right-0 ${statisticType === 'oneMonth' ? 'item-active' : ''}`}  onClick={this.changeActive.bind(this, 'oneMonth')}>{gettext('30 Days')}</div>
+            <div className={`system-statistic-item rounded-right ${statisticType === 'oneYear' ? 'item-active' : ''}`}  onClick={this.changeActive.bind(this, 'oneYear')}>{gettext('1 Year')}</div>
+          </div>
+          <div className="system-statistic-input-container">
+            <Picker
+              disabledDate={this.disabledStartDate}
+              value={startValue}
+              onChange={this.onChange.bind(this, 'startValue')}
+            />
+            <span className="system-statistic-connect">-</span>
+            <Picker
+              disabledDate={this.disabledEndDate}
+              value={endValue}
+              onChange={this.onChange.bind(this, 'endValue')}
+            />
+            <Button className="operation-item system-statistic-button" onClick={this.onSubmit}>{gettext('Submit')}</Button>
+          </div>
+        </div>
+      </Fragment>
+    );
+  }
+}
+
+StatisticCommonTool.propTypes = propTypes;
+
+export default StatisticCommonTool;
diff --git a/frontend/src/pages/org-admin/statistic/statistic-file.js b/frontend/src/pages/org-admin/statistic/statistic-file.js
new file mode 100644
index 0000000000..75708915a1
--- /dev/null
+++ b/frontend/src/pages/org-admin/statistic/statistic-file.js
@@ -0,0 +1,104 @@
+import React, { Fragment } from 'react';
+import moment from 'moment';
+import MainPanelTopbar from '../main-panel-topbar';
+import StatisticNav from './statistic-nav';
+import StatisticCommonTool from './statistic-common-tool';
+import { seafileAPI } from '../../../utils/seafile-api';
+import StatisticChart from './statistic-chart';
+import Loading from '../../../components/loading';
+import { gettext, orgID } from '../../../utils/constants';
+import { Utils } from '../../../utils/utils';
+import toaster from '../../../components/toast';
+
+import '../../../css/system-stat.css';
+
+class OrgStatisticFile extends React.Component {
+
+  constructor(props) {
+    super(props);
+    this.state = {
+      filesData: [],
+      labels: [],
+      isLoading: true
+    };
+  }
+
+  getActiviesFiles = (startTime, endTime, groupBy) => {
+    let { filesData } = this.state;
+
+    seafileAPI.orgAdminStatisticFiles(orgID, startTime, endTime, groupBy).then((res) => {
+      let labels = [],
+        added = [],
+        deleted = [],
+        visited = [],
+        modified = [];
+      let data = res.data;
+      if (Array.isArray(data)) {
+        data.forEach(item => {
+          labels.push(moment(item.datetime).format('YYYY-MM-DD'));
+          added.push(item.added);
+          deleted.push(item.deleted);
+          modified.push(item.modified);
+          visited.push(item.visited);
+        });
+        let addedData = {
+          label: gettext('Added'),
+          data: added,
+          borderColor: '#57cd6b',
+          backgroundColor: '#57cd6b'};
+        let visitedData = {
+          label: gettext('Visited'),
+          data: visited,
+          borderColor: '#fd913a',
+          backgroundColor: '#fd913a'};
+        let modifiedData = {
+          label: gettext('Modified'),
+          data: modified,
+          borderColor: '#72c3fc',
+          backgroundColor: '#72c3fc'};
+        let deletedData = {
+          label: gettext('Deleted'),
+          data: deleted,
+          borderColor: '#f75356',
+          backgroundColor: '#f75356'};
+        filesData = [visitedData, addedData, modifiedData, deletedData];
+      }
+      this.setState({
+        filesData: filesData,
+        labels: labels,
+        isLoading: false
+      });
+    }).catch(err => {
+      let errMessage = Utils.getErrorMsg(err);
+      toaster.danger(errMessage);
+    });
+  }
+
+  render() {
+    let { labels, filesData, isLoading } = this.state;
+
+    return(
+      <Fragment>
+        <MainPanelTopbar />
+        <div className="cur-view-container">
+          <StatisticNav currentItem="fileStatistic" />
+          <div className="cur-view-content">
+            <StatisticCommonTool getActiviesFiles={this.getActiviesFiles} />
+            {isLoading && <Loading />}
+            {!isLoading && labels.length > 0 &&
+              <StatisticChart
+                labels={labels}
+                filesData={filesData}
+                suggestedMaxNumbers={10}
+                isLegendStatus={true}
+                chartTitle={gettext('File Operations')}
+              />
+            }
+          </div>
+        </div>
+      </Fragment>
+    );
+  }
+}
+
+export default OrgStatisticFile;
diff --git a/frontend/src/pages/org-admin/statistic/statistic-nav.js b/frontend/src/pages/org-admin/statistic/statistic-nav.js
new file mode 100644
index 0000000000..eb5f20c488
--- /dev/null
+++ b/frontend/src/pages/org-admin/statistic/statistic-nav.js
@@ -0,0 +1,43 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import { Link } from '@reach/router';
+import { siteRoot, gettext } from '../../../utils/constants';
+
+const propTypes = {
+  currentItem: PropTypes.string.isRequired
+};
+
+class Nav extends React.Component {
+
+  constructor(props) {
+    super(props);
+    this.navItems = [
+      {name: 'fileStatistic', urlPart: 'statistics-admin/file', text: gettext('File')},
+      {name: 'storageStatistic', urlPart: 'statistics-admin/total-storage', text: gettext('Storage')},
+      {name: 'usersStatistic', urlPart: 'statistics-admin/active-users', text: gettext('Users')},
+      {name: 'trafficStatistic', urlPart: 'statistics-admin/traffic', text: gettext('Traffic')},
+      {name: 'reportsStatistic', urlPart: 'statistics-admin/reports', text: gettext('Reports')},
+    ];
+  }
+
+  render() {
+    const { currentItem } = this.props;
+    return (
+      <div className="cur-view-path tab-nav-container">
+        <ul className="nav">
+          {this.navItems.map((item, index) => {
+            return (
+              <li className="nav-item" key={index}>
+                <Link to={`${siteRoot}org/${item.urlPart}/`} className={`nav-link${currentItem == item.name ? ' active' : ''}`}>{item.text}</Link>
+              </li>
+            );
+          })}
+        </ul>
+      </div>
+    );
+  }
+}
+
+Nav.propTypes = propTypes;
+
+export default Nav;
diff --git a/frontend/src/pages/org-admin/statistic/statistic-reports.js b/frontend/src/pages/org-admin/statistic/statistic-reports.js
new file mode 100644
index 0000000000..11f2c51897
--- /dev/null
+++ b/frontend/src/pages/org-admin/statistic/statistic-reports.js
@@ -0,0 +1,88 @@
+import React, { Fragment } from 'react';
+import MainPanelTopbar from '../main-panel-topbar';
+import moment from 'moment';
+import StatisticNav from './statistic-nav';
+import { Button, Input } from 'reactstrap';
+import { siteRoot, gettext, orgID } from '../../../utils/constants';
+
+class OrgStatisticReports extends React.Component {
+
+  constructor(props) {
+    super(props);
+    this.state = {
+      month: moment().format('YYYYMM'),
+      errorMessage: ''
+    };
+  }
+
+  handleChange = (e) => {
+    let month = e.target.value;
+    this.setState({
+      month: month
+    });
+  }
+
+  onGenerateReports = (type) => {
+    let url = siteRoot + 'api/v2.1/org/' + orgID + '/admin/statistics/';
+    let { month } = this.state;
+    if (!month) {
+      let errorMessage = gettext('It is required.');
+      this.setState({
+        errorMessage: errorMessage
+      });
+      return;
+    }
+    if (type === 'month') {
+      let pattern = /^([012]\d{3})(0[1-9]|1[012])$/;
+      if (!pattern.test(month)) {
+        let errorMessage = gettext('Invalid month, should be yyyymm.');
+        this.setState({
+          errorMessage: errorMessage
+        });
+        return;
+      }
+    }
+    switch(type) {
+      case 'month':
+        url += 'user-traffic/excel/?month=' + month;
+        break;
+      case 'storage':
+        url += 'user-storage/excel/?';
+        break;
+    }
+    this.setState({
+      errorMessage: ''
+    });
+    window.location.href = url;
+  }
+
+  render() {
+
+    let { errorMessage } = this.state;
+    return(
+      <Fragment>
+        <MainPanelTopbar />
+        <div className="cur-view-container">
+          <StatisticNav currentItem="reportsStatistic" />
+          <div className="cur-view-content">
+            <div className="statistic-reports">
+              <div className="statistic-reports-title">{gettext('Monthly User Traffic')}</div>
+              <div className="d-flex align-items-center mt-4">
+                <span className="statistic-reports-tip">{gettext('Month:')}</span>
+                <Input className="statistic-reports-input" defaultValue={moment().format('YYYYMM')} onChange={this.handleChange} />
+                <Button className="statistic-reports-submit operation-item" onClick={this.onGenerateReports.bind(this, 'month')}>{gettext('Create Report')}</Button>
+              </div>
+              {errorMessage && <div className="error">{errorMessage}</div>}
+            </div>
+            <div className="statistic-reports">
+              <div className="statistic-reports-title">{gettext('User Storage')}</div>
+              <Button className="mt-4 operation-item" onClick={this.onGenerateReports.bind(this, 'storage')}>{gettext('Create Report')}</Button>
+            </div>
+          </div>
+        </div>
+      </Fragment>
+    );
+  }
+}
+
+export default OrgStatisticReports;
diff --git a/frontend/src/pages/org-admin/statistic/statistic-storage.js b/frontend/src/pages/org-admin/statistic/statistic-storage.js
new file mode 100644
index 0000000000..63a499e151
--- /dev/null
+++ b/frontend/src/pages/org-admin/statistic/statistic-storage.js
@@ -0,0 +1,81 @@
+import React, { Fragment } from 'react';
+import moment from 'moment';
+import MainPanelTopbar from '../main-panel-topbar';
+import StatisticNav from './statistic-nav';
+import StatisticCommonTool from './statistic-common-tool';
+import { seafileAPI } from '../../../utils/seafile-api';
+import StatisticChart from './statistic-chart';
+import Loading from '../../../components/loading';
+import { gettext, orgID } from '../../../utils/constants';
+import { Utils } from '../../../utils/utils';
+import toaster from '../../../components/toast';
+
+class OrgStatisticStorage extends React.Component {
+
+  constructor(props) {
+    super(props);
+    this.state = {
+      filesData: [],
+      labels: [],
+      isLoading: true
+    };
+  }
+
+  getActiviesFiles = (startTime, endTime, groupBy) => {
+    let { filesData } = this.state;
+    seafileAPI.orgAdminStatisticStorages(orgID, startTime, endTime, groupBy).then((res) => {
+      let labels = [],
+        totalStorage = [];
+      let data = res.data;
+      if (Array.isArray(data)) {
+        data.forEach(item => {
+          labels.push(moment(item.datetime).format('YYYY-MM-DD'));
+          totalStorage.push(item.total_storage);
+        });
+        let total_storage = {
+          label: gettext('Total Storage'),
+          data: totalStorage,
+          borderColor: '#fd913a',
+          backgroundColor: '#fd913a'};
+        filesData = [total_storage];
+      }
+      this.setState({
+        filesData: filesData,
+        labels: labels,
+        isLoading: false
+      });
+    }).catch(err => {
+      let errMessage = Utils.getErrorMsg(err);
+      toaster.danger(errMessage);
+    });
+  }
+
+  render() {
+    let { labels, filesData, isLoading } = this.state;
+    return(
+      <Fragment>
+        <MainPanelTopbar />
+        <div className="cur-view-container">
+          <StatisticNav currentItem="storageStatistic" />
+          <div className="cur-view-content">
+            <StatisticCommonTool getActiviesFiles={this.getActiviesFiles} />
+            {isLoading && <Loading />}
+            {!isLoading && labels.length > 0 &&
+              <StatisticChart
+                labels={labels}
+                filesData={filesData}
+                suggestedMaxNumbers={10*1000*1000}
+                isTitleCallback={true}
+                isTicksCallback={true}
+                isLegendStatus={false}
+                chartTitle={gettext('Total Storage')}
+              />
+            }
+          </div>
+        </div>
+      </Fragment>
+    );
+  }
+}
+
+export default OrgStatisticStorage;
diff --git a/frontend/src/pages/org-admin/statistic/statistic-traffic-users.js b/frontend/src/pages/org-admin/statistic/statistic-traffic-users.js
new file mode 100644
index 0000000000..6282c64549
--- /dev/null
+++ b/frontend/src/pages/org-admin/statistic/statistic-traffic-users.js
@@ -0,0 +1,158 @@
+import React, { Fragment } from 'react';
+import { Input } from 'reactstrap';
+import TrafficTable from './traffic-table';
+import TrafficTableBody from './traffic-table-body';
+import { seafileAPI } from '../../../utils/seafile-api';
+import Paginator from '../../../components/paginator';
+import moment from 'moment';
+import Loading from '../../../components/loading';
+import { gettext, orgID } from '../../../utils/constants';
+import { Utils } from '../../../utils/utils';
+import toaster from '../../../components/toast';
+
+class UsersTraffic extends React.Component {
+
+  constructor(props) {
+    super(props);
+    this.state = {
+      userTrafficList: [],
+      hasNextPage: false,
+      perPage: 25,
+      currentPage: 1,
+      month: moment().format('YYYYMM'),
+      isLoading: false,
+      errorMessage: '',
+      sortBy: 'link_file_download',
+      sortOrder: 'desc'
+    };
+    this.initPage = 1;
+    this.initMonth = moment().format('YYYYMM');
+  }
+
+  componentDidMount() {
+    let urlParams = (new URL(window.location)).searchParams;
+    const { currentPage, perPage } = this.state;
+    this.setState({
+      perPage: parseInt(urlParams.get('per_page') || perPage),
+      currentPage: parseInt(urlParams.get('page') || currentPage)
+    }, () => {
+      this.getTrafficList(this.initMonth, this.state.currentPage);
+    });
+  }
+
+  getPreviousPage = () => {
+    this.getTrafficList(this.state.month, this.state.currentPage - 1);
+  }
+
+  getNextPage = () => {
+    this.getTrafficList(this.state.month, this.state.currentPage + 1);
+  }
+
+  handleChange = (e) => {
+    let month = e.target.value;
+    this.setState({
+      month: month
+    });
+  }
+
+  handleKeyPress = (e) => {
+    let { month } = this.state;
+    if (e.key === 'Enter') {
+      let pattern = /^([012]\d{3})(0[1-9]|1[012])$/;
+      if (!pattern.test(month)) {
+        let errorMessage = gettext('Invalid month, should be yyyymm.');
+        this.setState({
+          errorMessage: errorMessage
+        });
+        return;
+      }
+      this.getTrafficList(month, this.initPage);
+      e.target.blur();
+      e.preventDefault();
+    }
+  }
+
+  getTrafficList = (month, page) => {
+    const { perPage, sortBy, sortOrder } = this.state;
+    const orderBy = sortOrder == 'asc' ? sortBy : `${sortBy}_${sortOrder}`;
+    this.setState({
+      isLoading: true,
+      errorMessage: ''
+    });
+    seafileAPI.orgAdminListUserTraffic(orgID, month, page, perPage, orderBy).then(res => {
+      let userTrafficList = res.data.user_monthly_traffic_list.slice(0);
+      this.setState({
+        month: month,
+        currentPage: page,
+        userTrafficList: userTrafficList,
+        hasNextPage: res.data.has_next_page,
+        isLoading: false
+      });
+    }).catch(err => {
+      let errMessage = Utils.getErrorMsg(err);
+      toaster.danger(errMessage);
+    });
+  }
+
+  sortItems = (sortBy) => {
+    this.setState({
+      sortBy: sortBy,
+      sortOrder: this.state.sortOrder == 'asc' ? 'desc' : 'asc'
+    }, () => {
+      const { month, currentPage } = this.state;
+      this.getTrafficList(month, currentPage);
+    });
+  }
+
+  resetPerPage = (newPerPage) => {
+    this.setState({
+      perPage: newPerPage,
+    }, () => this.getTrafficList(this.initMonth, this.initPage));
+  }
+
+  render() {
+    const {
+      isLoading, errorMessage, userTrafficList,
+      currentPage, hasNextPage, perPage,
+      sortBy, sortOrder
+    } = this.state;
+    return (
+      <Fragment>
+        <div className="d-flex align-items-center mt-4">
+          <span className="statistic-reports-tip">{gettext('Month:')}</span>
+          <Input
+            className="statistic-reports-input"
+            defaultValue={moment().format('YYYYMM')}
+            onChange={this.handleChange}
+            onKeyPress={this.handleKeyPress}
+          />
+          {errorMessage && <div className="error">{errorMessage}</div>}
+        </div>
+        {isLoading && <Loading />}
+        {!isLoading &&
+          <TrafficTable type={'user'} sortItems={this.sortItems} sortBy={sortBy} sortOrder={sortOrder}>
+            {userTrafficList.length > 0 && userTrafficList.map((item, index) => {
+              return(
+                <TrafficTableBody
+                  key={index}
+                  userTrafficItem={item}
+                  type={'user'}
+                />
+              );
+            })}
+          </TrafficTable>
+        }
+        <Paginator
+          gotoPreviousPage={this.getPreviousPage}
+          gotoNextPage={this.getNextPage}
+          currentPage={currentPage}
+          hasNextPage={hasNextPage}
+          curPerPage={perPage}
+          resetPerPage={this.resetPerPage}
+        />
+      </Fragment>
+    );
+  }
+}
+
+export default UsersTraffic;
diff --git a/frontend/src/pages/org-admin/statistic/statistic-traffic.js b/frontend/src/pages/org-admin/statistic/statistic-traffic.js
new file mode 100644
index 0000000000..31a89b0844
--- /dev/null
+++ b/frontend/src/pages/org-admin/statistic/statistic-traffic.js
@@ -0,0 +1,213 @@
+import React, { Fragment } from 'react';
+import moment from 'moment';
+import { gettext, orgID } from '../../../utils/constants';
+import { seafileAPI } from '../../../utils/seafile-api';
+import MainPanelTopbar from '../main-panel-topbar';
+import StatisticNav from './statistic-nav';
+import StatisticCommonTool from './statistic-common-tool';
+import Loading from '../../../components/loading';
+import UsersTraffic from './statistic-traffic-users';
+import StatisticChart from './statistic-chart';
+import { Utils } from '../../../utils/utils';
+import toaster from '../../../components/toast';
+
+class OrgStatisticTraffic extends React.Component {
+
+  constructor(props) {
+    super(props);
+    this.state = {
+      filesData: [],
+      linkData: [],
+      syncData: [],
+      webData: [],
+      labels: [],
+      isLoading: true,
+      tabActive: 'system'
+    };
+  }
+
+  changeTabActive = activeName => {
+    this.setState({tabActive: activeName});
+  }
+
+  getActiviesFiles = (startTime, endTime, groupBy) => {
+    seafileAPI.orgAdminStatisticSystemTraffic(orgID, startTime, endTime, groupBy).then((res) => {
+      let labels = [];
+      let total_upload = [],
+        total_download = [],
+        link_upload = [],
+        link_download = [],
+        sync_upload = [],
+        sync_download = [],
+        web_upload = [],
+        web_download = [];
+      let data = res.data;
+      if (Array.isArray(data)) {
+        data.forEach(item => {
+          labels.push(moment(item.datetime).format('YYYY-MM-DD'));
+          link_upload.push(item['link-file-upload']);
+          link_download.push(item['link-file-download']);
+          sync_upload.push(item['sync-file-upload']);
+          sync_download.push(item['sync-file-download']);
+          web_upload.push(item['web-file-upload']);
+          web_download.push(item['web-file-download']);
+          total_upload.push(item['link-file-upload'] + item['sync-file-upload'] + item['web-file-upload']);
+          total_download.push(item['link-file-download'] + item['sync-file-download'] + item['web-file-download']);
+        });
+        let linkUpload = {
+          label: gettext('Upload'),
+          data: link_upload,
+          borderColor: '#fd913a',
+          backgroundColor: '#fd913a'};
+        let linkDownload = {
+          label: gettext('Download'),
+          data: link_download,
+          borderColor: '#57cd6b',
+          backgroundColor: '#57cd6b'};
+        let syncUpload = {
+          label: gettext('Upload'),
+          data: sync_upload,
+          borderColor: '#fd913a',
+          backgroundColor: '#fd913a'};
+        let syncDownload = {
+          label: gettext('Download'),
+          data: sync_download,
+          borderColor: '#57cd6b',
+          backgroundColor: '#57cd6b'};
+        let webUpload = {
+          label: gettext('Upload'),
+          data: web_upload,
+          borderColor: '#fd913a',
+          backgroundColor: '#fd913a'};
+        let webDownload = {
+          label: gettext('Download'),
+          data: web_download,
+          borderColor: '#57cd6b',
+          backgroundColor: '#57cd6b'};
+        let totalUpload = {
+          label: gettext('Upload'),
+          data: total_upload,
+          borderColor: '#fd913a',
+          backgroundColor: '#fd913a'};
+        let totalDownload = {
+          label: gettext('Download'),
+          data: total_download,
+          borderColor: '#57cd6b',
+          backgroundColor: '#57cd6b'};
+        let linkData = [linkUpload, linkDownload];
+        let syncData = [syncUpload, syncDownload];
+        let webData = [webUpload, webDownload];
+        let filesData = [totalUpload, totalDownload];
+        this.setState({
+          linkData: linkData,
+          syncData: syncData,
+          webData: webData,
+          filesData: filesData,
+          labels: labels,
+          isLoading: false
+        });
+      }
+    }).catch(err => {
+      let errMessage = Utils.getErrorMsg(err);
+      toaster.danger(errMessage);
+    });
+  }
+
+  renderCommonTool = () => {
+    let { tabActive } = this.state;
+    if (tabActive === 'system') {
+      return (
+        <StatisticCommonTool getActiviesFiles={this.getActiviesFiles}>
+          <div className="statistic-traffic-tab">
+            <div className={`statistic-traffic-tab-item ${tabActive === 'system' ? 'active' : ''}`} onClick={this.changeTabActive.bind(this, 'system')}>{gettext('System')}</div>
+            <div className={`statistic-traffic-tab-item ${tabActive === 'user' ? 'active' : ''}`} onClick={this.changeTabActive.bind(this, 'user')}>{gettext('Users')}</div>
+          </div>
+        </StatisticCommonTool>
+      );
+    }
+    return (
+      <div className="statistic-traffic-tab">
+        <div className={`statistic-traffic-tab-item ${tabActive === 'system' ? 'active' : ''}`} onClick={this.changeTabActive.bind(this, 'system')}>{gettext('System')}</div>
+        <div className={`statistic-traffic-tab-item ${tabActive === 'user' ? 'active' : ''}`} onClick={this.changeTabActive.bind(this, 'user')}>{gettext('Users')}</div>
+      </div>
+    );
+  }
+
+  render() {
+    let { labels, filesData, linkData, syncData, webData, isLoading, tabActive } = this.state;
+
+    return (
+      <Fragment>
+        <MainPanelTopbar />
+        <div className="cur-view-container">
+          <StatisticNav currentItem="trafficStatistic" />
+          <div className="cur-view-content">
+            {this.renderCommonTool()}
+            {isLoading && <Loading />}
+            {!isLoading && tabActive === 'system' &&
+              <div className="statistic-traffic-chart-container">
+                <div className="mb-4">
+                  {labels.length > 0 &&
+                    <StatisticChart
+                      labels={labels}
+                      filesData={filesData}
+                      chartTitle={gettext('Total Traffic')}
+                      suggestedMaxNumbers={10*1000*1000}
+                      isTitleCallback={true}
+                      isTicksCallback={true}
+                      isLegendStatus={true}
+                    />
+                  }
+                </div>
+                <div className="mb-4">
+                  {labels.length > 0 &&
+                    <StatisticChart
+                      labels={labels}
+                      filesData={webData}
+                      chartTitle={gettext('Web Traffic')}
+                      suggestedMaxNumbers={10*1000*1000}
+                      isTitleCallback={true}
+                      isTicksCallback={true}
+                      isLegendStatus={true}
+                    />
+                  }
+                </div>
+                <div className="mb-4">
+                  {labels.length > 0 &&
+                    <StatisticChart
+                      labels={labels}
+                      filesData={linkData}
+                      chartTitle={gettext('Share Link Traffic')}
+                      suggestedMaxNumbers={10*1000*1000}
+                      isTitleCallback={true}
+                      isTicksCallback={true}
+                      isLegendStatus={true}
+                    />
+                  }
+                </div>
+                <div className="mb-4">
+                  {labels.length > 0 &&
+                    <StatisticChart
+                      labels={labels}
+                      filesData={syncData}
+                      chartTitle={gettext('Sync Traffic')}
+                      suggestedMaxNumbers={10*1000*1000}
+                      isTitleCallback={true}
+                      isTicksCallback={true}
+                      isLegendStatus={true}
+                    />
+                  }
+                </div>
+              </div>
+            }
+            {!isLoading && tabActive === 'user' &&
+              <UsersTraffic />
+            }
+          </div>
+        </div>
+      </Fragment>
+    );
+  }
+}
+
+export default OrgStatisticTraffic;
diff --git a/frontend/src/pages/org-admin/statistic/statistic-users.js b/frontend/src/pages/org-admin/statistic/statistic-users.js
new file mode 100644
index 0000000000..e9421bd992
--- /dev/null
+++ b/frontend/src/pages/org-admin/statistic/statistic-users.js
@@ -0,0 +1,79 @@
+import React, { Fragment } from 'react';
+import moment from 'moment';
+import { gettext, orgID } from '../../../utils/constants';
+import MainPanelTopbar from '../main-panel-topbar';
+import StatisticNav from './statistic-nav';
+import StatisticCommonTool from './statistic-common-tool';
+import { seafileAPI } from '../../../utils/seafile-api';
+import StatisticChart from './statistic-chart';
+import Loading from '../../../components/loading';
+import { Utils } from '../../../utils/utils';
+import toaster from '../../../components/toast';
+
+class OrgStatisticUsers extends React.Component {
+
+  constructor(props) {
+    super(props);
+    this.state = {
+      filesData: [],
+      labels: [],
+      isLoading: true,
+    };
+  }
+
+  getActiviesFiles = (startTime, endTime, groupBy) => {
+    let { filesData } = this.state;
+    seafileAPI.orgAdminStatisticActiveUsers(orgID, startTime, endTime, groupBy).then((res) => {
+      let labels = [],
+        count = [];
+      let data = res.data;
+      if (Array.isArray(data)) {
+        data.forEach(item => {
+          labels.push(moment(item.datetime).format('YYYY-MM-DD'));
+          count.push(item.count);
+        });
+        let userCount = {
+          label: gettext('Active Users'),
+          data: count,
+          borderColor: '#fd913a',
+          backgroundColor: '#fd913a'};
+        filesData = [userCount];
+      }
+      this.setState({
+        filesData: filesData,
+        labels: labels,
+        isLoading: false
+      });
+    }).catch(err => {
+      let errMessage = Utils.getErrorMsg(err);
+      toaster.danger(errMessage);
+    });
+  }
+
+  render() {
+    let { labels, filesData, isLoading } = this.state;
+    return (
+      <Fragment>
+        <MainPanelTopbar />
+        <div className="cur-view-container">
+          <StatisticNav currentItem="usersStatistic" />
+          <div className="cur-view-content">
+            <StatisticCommonTool getActiviesFiles={this.getActiviesFiles} />
+            {isLoading && <Loading />}
+            {!isLoading && labels.length > 0 &&
+              <StatisticChart
+                labels={labels}
+                filesData={filesData}
+                suggestedMaxNumbers={10}
+                isLegendStatus={false}
+                chartTitle={gettext('Active Users')}
+              />
+            }
+          </div>
+        </div>
+      </Fragment>
+    );
+  }
+}
+
+export default OrgStatisticUsers;
diff --git a/frontend/src/pages/org-admin/statistic/traffic-table-body.js b/frontend/src/pages/org-admin/statistic/traffic-table-body.js
new file mode 100644
index 0000000000..67dd62155d
--- /dev/null
+++ b/frontend/src/pages/org-admin/statistic/traffic-table-body.js
@@ -0,0 +1,54 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import { Utils } from '../../../utils/utils';
+import { siteRoot } from '../../../utils/constants';
+
+const propTypes = {
+  type: PropTypes.string.isRequired,
+  userTrafficItem: PropTypes.object.isRequired,
+};
+
+class TrafficTableBody extends React.Component {
+
+  trafficName = () => {
+    let { userTrafficItem, type } = this.props;
+    switch(type) {
+      case 'user':
+        if (userTrafficItem.name) {
+          return (
+            <a href={siteRoot + 'useradmin/info/' + userTrafficItem.email + '/'}>{userTrafficItem.name}</a>
+          );
+        }
+        return(<span>{'--'}</span>);
+      case 'org':
+        return(<span>{userTrafficItem.org_name}</span>);
+    }
+  }
+
+  render() {
+    let { userTrafficItem } = this.props;
+
+    let syncUploadSize = Utils.bytesToSize(userTrafficItem.sync_file_upload);
+    let syncDownloadSize = Utils.bytesToSize(userTrafficItem.sync_file_download);
+    let webUploadSize = Utils.bytesToSize(userTrafficItem.web_file_upload);
+    let webDownloadSize = Utils.bytesToSize(userTrafficItem.web_file_download);
+    let linkUploadSize = Utils.bytesToSize(userTrafficItem.link_file_upload);
+    let linkDownloadSize = Utils.bytesToSize(userTrafficItem.link_file_download);
+
+    return(
+      <tr>
+        <td>{this.trafficName()}</td>
+        <td>{syncUploadSize}</td>
+        <td>{syncDownloadSize}</td>
+        <td>{webUploadSize}</td>
+        <td>{webDownloadSize}</td>
+        <td>{linkUploadSize}</td>
+        <td>{linkDownloadSize}</td>
+      </tr>
+    );
+  }
+}
+
+TrafficTableBody.propTypes = propTypes;
+
+export default TrafficTableBody;
diff --git a/frontend/src/pages/org-admin/statistic/traffic-table.js b/frontend/src/pages/org-admin/statistic/traffic-table.js
new file mode 100644
index 0000000000..34bcb944a1
--- /dev/null
+++ b/frontend/src/pages/org-admin/statistic/traffic-table.js
@@ -0,0 +1,46 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import { gettext } from '../../../utils/constants';
+
+const propTypes = {
+  type: PropTypes.string.isRequired,
+  sortBy: PropTypes.string.isRequired,
+  sortOrder: PropTypes.string.isRequired,
+  sortItems: PropTypes.func.isRequired,
+  children: PropTypes.oneOfType([PropTypes.bool, PropTypes.array]),
+};
+
+class TrafficTable extends React.Component {
+
+  constructor(props) {
+    super(props);
+  }
+
+  render() {
+    const { type, sortBy, sortOrder } = this.props;
+    const sortIcon = sortOrder == 'asc' ? <span className="fas fa-caret-up"></span> : <span className="fas fa-caret-down"></span>;
+
+    return (
+      <table className="table-hover">
+        <thead>
+          <tr>
+            <th width="16%">{type == 'user' ? gettext('User') : gettext('Organization')}</th>
+            <th width="11%"><div className="d-block table-sort-op cursor-pointer" onClick={this.props.sortItems.bind(this, 'sync_file_upload')}>{gettext('Sync Upload')} {sortBy === 'sync_file_upload' && sortIcon}</div></th>
+            <th width="14%"><div className="d-block table-sort-op cursor-pointer" onClick={this.props.sortItems.bind(this, 'sync_file_download')}>{gettext('Sync Download')} {sortBy === 'sync_file_download' && sortIcon}</div></th>
+            <th width="11%"><div className="d-block table-sort-op cursor-pointer" onClick={this.props.sortItems.bind(this, 'web_file_upload')}>{gettext('Web Upload')} {sortBy === 'web_file_upload' && sortIcon}</div></th>
+            <th width="14%"><div className="d-block table-sort-op cursor-pointer" onClick={this.props.sortItems.bind(this, 'web_file_download')}>{gettext('Web Download')} {sortBy === 'web_file_download' && sortIcon}</div></th>
+            <th width="17%"><div className="d-block table-sort-op cursor-pointer" onClick={this.props.sortItems.bind(this, 'link_file_upload')}>{gettext('Share link upload')} {sortBy === 'link_file_upload' && sortIcon}</div></th>
+            <th width="17%"><div className="d-block table-sort-op cursor-pointer" onClick={this.props.sortItems.bind(this, 'link_file_download')}>{gettext('Share link download')} {sortBy === 'link_file_download' && sortIcon}</div></th>
+          </tr>
+        </thead>
+        <tbody>
+          {this.props.children}
+        </tbody>
+      </table>
+    );
+  }
+}
+
+TrafficTable.propTypes = propTypes;
+
+export default TrafficTable;
diff --git a/frontend/src/pages/org-admin/user-link.js b/frontend/src/pages/org-admin/user-link.js
new file mode 100644
index 0000000000..f4bb4be3bc
--- /dev/null
+++ b/frontend/src/pages/org-admin/user-link.js
@@ -0,0 +1,20 @@
+import React, { Component } from 'react';
+import PropTypes from 'prop-types';
+import { Link } from '@reach/router';
+import { siteRoot, orgID } from '../../utils/constants';
+
+const propTypes = {
+  email: PropTypes.string.isRequired,
+  name: PropTypes.string.isRequired
+};
+
+class UserLink extends Component {
+
+  render() {
+    return <Link to={`${siteRoot}org/useradmin/info/${encodeURIComponent(this.props.email)}/`}>{this.props.name}</Link>;
+  }
+}
+
+UserLink.propTypes = propTypes;
+
+export default UserLink;
diff --git a/seahub/organizations/api/admin/devices.py b/seahub/organizations/api/admin/devices.py
new file mode 100644
index 0000000000..05db9dcace
--- /dev/null
+++ b/seahub/organizations/api/admin/devices.py
@@ -0,0 +1,220 @@
+# Copyright (c) 2012-2016 Seafile Ltd.
+import logging
+
+from rest_framework.authentication import SessionAuthentication
+from rest_framework.response import Response
+from rest_framework.views import APIView
+from rest_framework import status
+
+from seaserv import seafile_api, ccnet_api
+from pysearpc import SearpcError
+
+from seahub.utils.devices import do_unlink_device
+from seahub.utils.timeutils import datetime_to_isoformat_timestr, \
+        timestamp_to_isoformat_timestr
+
+from seahub.api2.permissions import IsProVersion, IsOrgAdminUser
+from seahub.api2.authentication import TokenAuthentication
+from seahub.api2.throttling import UserRateThrottle
+from seahub.api2.utils import api_error
+from seahub.api2.models import TokenV2, DESKTOP_PLATFORMS, MOBILE_PLATFORMS
+from seahub.base.templatetags.seahub_tags import email2nickname
+
+logger = logging.getLogger(__name__)
+
+
+class OrgAdminDevices(APIView):
+
+    authentication_classes = (TokenAuthentication, SessionAuthentication)
+    throttle_classes = (UserRateThrottle,)
+    permission_classes = (IsProVersion, IsOrgAdminUser)
+
+    def get(self, request, org_id):
+
+        org_id = int(org_id)
+        org = ccnet_api.get_org_by_id(org_id)
+        if not org:
+            error_msg = 'Organization %s not found.' % org_id
+            return api_error(status.HTTP_404_NOT_FOUND, error_msg)
+
+        try:
+            current_page = int(request.GET.get('page', '1'))
+            per_page = int(request.GET.get('per_page', '50'))
+        except ValueError:
+            current_page = 1
+            per_page = 50
+
+        start = (current_page - 1) * per_page
+        end = current_page * per_page + 1
+
+        platform = request.GET.get('platform', None)
+        org_users = ccnet_api.get_org_users_by_url_prefix(org.url_prefix, -1, -1)
+        org_user_emails = [user.email for user in org_users]
+
+        devices = TokenV2.objects.filter(wiped_at=None)
+
+        if platform == 'desktop':
+            devices = devices.filter(platform__in=DESKTOP_PLATFORMS) \
+                             .filter(user__in=org_user_emails) \
+                             .order_by('-last_accessed')[start: end]
+
+        elif platform == 'mobile':
+            devices = devices.filter(platform__in=MOBILE_PLATFORMS) \
+                             .filter(user__in=org_user_emails) \
+                             .order_by('-last_accessed')[start: end]
+        else:
+            devices = devices.order_by('-last_accessed') \
+                             .filter(user__in=org_user_emails)[start: end]
+
+        if len(devices) == end - start:
+            devices = devices[:per_page]
+            has_next_page = True
+        else:
+            has_next_page = False
+
+        return_results = []
+        for device in devices:
+            result = {}
+            result['client_version'] = device.client_version
+            result['device_id'] = device.device_id
+            result['device_name'] = device.device_name
+            result['last_accessed'] = datetime_to_isoformat_timestr(device.last_accessed)
+            result['last_login_ip'] = device.last_login_ip
+            result['user'] = device.user
+            result['user_name'] = email2nickname(device.user)
+            result['platform'] = device.platform
+
+            result['is_desktop_client'] = False
+            if result['platform'] in DESKTOP_PLATFORMS:
+                result['is_desktop_client'] = True
+
+            return_results.append(result)
+
+        page_info = {
+            'has_next_page': has_next_page,
+            'current_page': current_page
+        }
+        return Response({"page_info": page_info, "devices": return_results})
+
+    def delete(self, request, org_id):
+
+        org_id = int(org_id)
+        org = ccnet_api.get_org_by_id(org_id)
+        if not org:
+            error_msg = 'Organization %s not found.' % org_id
+            return api_error(status.HTTP_404_NOT_FOUND, error_msg)
+
+        platform = request.data.get('platform', '')
+        device_id = request.data.get('device_id', '')
+        remote_wipe = request.data.get('wipe_device', '')
+        user = request.data.get('user', '')
+
+        if not platform:
+            error_msg = 'platform invalid.'
+            return api_error(status.HTTP_400_BAD_REQUEST, error_msg)
+
+        if not device_id:
+            error_msg = 'device_id invalid.'
+            return api_error(status.HTTP_400_BAD_REQUEST, error_msg)
+
+        if not user:
+            error_msg = 'user invalid.'
+            return api_error(status.HTTP_400_BAD_REQUEST, error_msg)
+
+        remote_wipe = True if remote_wipe == 'true' else False
+
+        try:
+            do_unlink_device(user, platform, device_id, remote_wipe=remote_wipe)
+        except SearpcError as e:
+            logger.error(e)
+            error_msg = 'Internal Server Error'
+            return api_error(status.HTTP_500_INTERNAL_SERVER_ERROR, error_msg)
+
+        return Response({'success': True})
+
+
+class OrgAdminDevicesErrors(APIView):
+
+    authentication_classes = (TokenAuthentication, SessionAuthentication)
+    throttle_classes = (UserRateThrottle, )
+    permission_classes = (IsProVersion, IsOrgAdminUser)
+
+    def get(self, request, org_id):
+
+        org_id = int(org_id)
+        org = ccnet_api.get_org_by_id(org_id)
+        if not org:
+            error_msg = 'Organization %s not found.' % org_id
+            return api_error(status.HTTP_404_NOT_FOUND, error_msg)
+
+        try:
+            current_page = int(request.GET.get('page', '1'))
+            per_page = int(request.GET.get('per_page', '100'))
+        except ValueError:
+            current_page = 1
+            per_page = 100
+
+        start = (current_page - 1) * per_page
+        limit = per_page + 1
+
+        return_results = []
+        try:
+            device_errors = seafile_api.list_org_repo_sync_errors(org_id, start, limit)
+        except SearpcError as e:
+            logger.error(e)
+            error_msg = 'Internal Server Error'
+            return api_error(status.HTTP_500_INTERNAL_SERVER_ERROR, error_msg)
+
+        if len(device_errors) > per_page:
+            device_errors = device_errors[:per_page]
+            has_next_page = True
+        else:
+            has_next_page = False
+
+        for error in device_errors:
+            result = {}
+            result['email'] = error.email if error.email else ''
+            result['name'] = email2nickname(error.email)
+            result['device_ip'] = error.peer_ip if error.peer_ip else ''
+            result['repo_name'] = error.repo_name if error.repo_name else ''
+            result['repo_id'] = error.repo_id if error.repo_id else ''
+            result['error_msg'] = error.error_con if error.error_con else ''
+
+            tokens = TokenV2.objects.filter(device_id=error.peer_id)
+            if tokens:
+                result['device_name'] = tokens[0].device_name
+                result['client_version'] = tokens[0].client_version
+            else:
+                result['device_name'] = ''
+                result['client_version'] = ''
+
+            if error.error_time:
+                result['error_time'] = timestamp_to_isoformat_timestr(error.error_time)
+            else:
+                result['error_time'] = ''
+
+            return_results.append(result)
+
+        page_info = {
+            'has_next_page': has_next_page,
+            'current_page': current_page
+        }
+
+        return Response({"page_info": page_info, "device_errors": return_results})
+
+    def delete(self, request, org_id):
+
+        org_id = int(org_id)
+        org = ccnet_api.get_org_by_id(org_id)
+        if not org:
+            error_msg = 'Organization %s not found.' % org_id
+            return api_error(status.HTTP_404_NOT_FOUND, error_msg)
+
+        try:
+            seafile_api.clear_repo_sync_errors()
+        except SearpcError as e:
+            logger.error(e)
+            error_msg = 'Internal Server Error'
+            return api_error(status.HTTP_500_INTERNAL_SERVER_ERROR, error_msg)
+
+        return Response({'success': True})
diff --git a/seahub/organizations/api/admin/statistics.py b/seahub/organizations/api/admin/statistics.py
new file mode 100644
index 0000000000..e93e5d412c
--- /dev/null
+++ b/seahub/organizations/api/admin/statistics.py
@@ -0,0 +1,411 @@
+# Copyright (c) 2012-2016 Seafile Ltd.
+import datetime
+import pytz
+import logging
+
+from rest_framework.authentication import SessionAuthentication
+from rest_framework.response import Response
+from rest_framework.views import APIView
+from rest_framework import status
+from django.utils import timezone
+from django.utils.translation import ugettext as _
+from django.http import HttpResponse
+
+from seaserv import ccnet_api
+
+from seahub.utils import get_org_file_ops_stats_by_day, \
+        get_org_total_storage_stats_by_day, get_org_user_activity_stats_by_day, \
+        get_org_traffic_by_day, is_pro_version, EVENTS_ENABLED, \
+        seafevents_api
+from seahub.utils.timeutils import datetime_to_isoformat_timestr
+from seahub.utils.ms_excel import write_xls
+from seahub.utils.file_size import byte_to_mb
+from seahub.views.sysadmin import _populate_user_quota_usage
+from seahub.base.templatetags.seahub_tags import email2nickname, \
+        email2contact_email
+
+from seahub.api2.permissions import IsProVersion, IsOrgAdminUser
+from seahub.api2.authentication import TokenAuthentication
+from seahub.api2.throttling import UserRateThrottle
+from seahub.api2.utils import api_error
+
+logger = logging.getLogger(__name__)
+
+
+def get_time_offset():
+    timezone_name = timezone.get_current_timezone_name()
+    offset = pytz.timezone(timezone_name).localize(datetime.datetime.now()).strftime('%z')
+    return offset[:3] + ':' + offset[3:]
+
+
+def get_init_data(start_time, end_time, init_data=0):
+    res = {}
+    start_time = start_time.replace(hour=0).replace(minute=0).replace(second=0)
+    end_time = end_time.replace(hour=0).replace(minute=0).replace(second=0)
+    time_delta = end_time - start_time
+    date_length = time_delta.days + 1
+    for offset in range(date_length):
+        offset = offset * 24
+        dt = start_time + datetime.timedelta(hours=offset)
+        if isinstance(init_data, dict):
+            res[dt] = init_data.copy()
+        else:
+            res[dt] = init_data
+    return res
+
+
+def check_parameter(func):
+
+    def _decorated(view, request, org_id, *args, **kwargs):
+
+        if not is_pro_version() or not EVENTS_ENABLED:
+            return api_error(status.HTTP_404_NOT_FOUND, 'Events not enabled.')
+
+        start_time = request.GET.get("start", "")
+        end_time = request.GET.get("end", "")
+
+        if not start_time:
+            error_msg = "Start time can not be empty"
+            return api_error(status.HTTP_400_BAD_REQUEST, error_msg)
+
+        if not end_time:
+            error_msg = "End time can not be empty"
+            return api_error(status.HTTP_400_BAD_REQUEST, error_msg)
+
+        try:
+            start_time = datetime.datetime.strptime(start_time, "%Y-%m-%d %H:%M:%S")
+        except Exception:
+            error_msg = "Start time %s invalid" % start_time
+            return api_error(status.HTTP_400_BAD_REQUEST, error_msg)
+
+        try:
+            end_time = datetime.datetime.strptime(end_time, "%Y-%m-%d %H:%M:%S")
+        except Exception:
+            error_msg = "End time %s invalid" % end_time
+            return api_error(status.HTTP_400_BAD_REQUEST, error_msg)
+
+        return func(view, request, org_id, start_time, end_time, *args, **kwargs)
+
+    return _decorated
+
+
+class OrgFileOperationsView(APIView):
+
+    """
+    Get file operations statistics.
+        Permission checking:
+        1. only org admin can perform this action.
+    """
+
+    authentication_classes = (TokenAuthentication, SessionAuthentication)
+    throttle_classes = (UserRateThrottle,)
+    permission_classes = (IsProVersion, IsOrgAdminUser)
+
+    @check_parameter
+    def get(self, request, org_id, start_time, end_time):
+        """
+        Get records of the specified time range.
+            param:
+                start: the start time of the query.
+                end: the end time of the query.
+            return:
+                the list of file operations record.
+        """
+        data = get_org_file_ops_stats_by_day(org_id, start_time, end_time, get_time_offset())
+        ops_added_dict = get_init_data(start_time, end_time)
+        ops_visited_dict = get_init_data(start_time, end_time)
+        ops_deleted_dict = get_init_data(start_time, end_time)
+        ops_modified_dict = get_init_data(start_time, end_time)
+
+        # [{'number': 2,
+        #   'op_type': 'Added',
+        #   'timestamp': datetime.datetime(2022, 10, 27, 0, 0)}]
+        for item in data:
+            if item.get('op_type') == 'Added':
+                ops_added_dict[item.get('timestamp')] = item.get('number')
+            if item.get('op_type') == 'Visited':
+                ops_visited_dict[item.get('timestamp')] = item.get('number')
+            if item.get('op_type') == 'Deleted':
+                ops_deleted_dict[item.get('timestamp')] = item.get('number')
+            if item.get('op_type') == 'Modified':
+                ops_modified_dict[item.get('timestamp')] = item.get('number')
+
+        res_data = []
+        for k, v in list(ops_added_dict.items()):
+            res_data.append({'datetime': datetime_to_isoformat_timestr(k),
+                             'added': v,
+                             'visited': ops_visited_dict[k],
+                             'deleted': ops_deleted_dict[k],
+                             'modified': ops_modified_dict[k]})
+
+        return Response(sorted(res_data, key=lambda x: x['datetime']))
+
+
+class OrgTotalStorageView(APIView):
+
+    authentication_classes = (TokenAuthentication, SessionAuthentication)
+    throttle_classes = (UserRateThrottle,)
+    permission_classes = (IsProVersion, IsOrgAdminUser)
+
+    @check_parameter
+    def get(self, request, org_id, start_time, end_time):
+
+        data = get_org_total_storage_stats_by_day(org_id, start_time, end_time, get_time_offset())
+
+        # [{'number': Decimal('2558796'),
+        #   'timestamp': datetime.datetime(2022, 11, 1, 0, 0)},
+        #  {'number': Decimal('2558796'),
+        #   'timestamp': datetime.datetime(2022, 11, 2, 0, 0)}]
+        init_data = get_init_data(start_time, end_time)
+        for e in data:
+            init_data[e.get("timestamp")] = e.get("number")
+
+        res_data = []
+        for k, v in list(init_data.items()):
+            res_data.append({'datetime': datetime_to_isoformat_timestr(k), 'total_storage': v})
+
+        return Response(sorted(res_data, key=lambda x: x['datetime']))
+
+
+class OrgActiveUsersView(APIView):
+
+    authentication_classes = (TokenAuthentication, SessionAuthentication)
+    throttle_classes = (UserRateThrottle,)
+    permission_classes = (IsProVersion, IsOrgAdminUser)
+
+    @check_parameter
+    def get(self, request, org_id, start_time, end_time):
+
+        data = get_org_user_activity_stats_by_day(org_id, start_time, end_time)
+
+        # [{'number': 1, 'timestamp': datetime.datetime(2022, 10, 27, 0, 0)},
+        #  {'number': 2, 'timestamp': datetime.datetime(2022, 10, 31, 0, 0)},
+        #  {'number': 2, 'timestamp': datetime.datetime(2022, 11, 1, 0, 0)},
+        #  {'number': 1, 'timestamp': datetime.datetime(2022, 11, 2, 0, 0)}]
+        init_data = get_init_data(start_time, end_time)
+        for e in data:
+            init_data[e.get("timestamp")] = e.get("number")
+
+        res_data = []
+        for k, v in list(init_data.items()):
+            res_data.append({'datetime': datetime_to_isoformat_timestr(k), 'count': v})
+
+        return Response(sorted(res_data, key=lambda x: x['datetime']))
+
+
+class OrgSystemTrafficView(APIView):
+
+    authentication_classes = (TokenAuthentication, SessionAuthentication)
+    throttle_classes = (UserRateThrottle,)
+    permission_classes = (IsProVersion, IsOrgAdminUser)
+
+    @check_parameter
+    def get(self, request, org_id, start_time, end_time):
+
+        op_type_list = ['web-file-upload', 'web-file-download',
+                        'sync-file-download', 'sync-file-upload',
+                        'link-file-upload', 'link-file-download']
+        init_count = [0] * 6
+        init_data = get_init_data(start_time, end_time,
+                                  dict(list(zip(op_type_list, init_count))))
+
+        data = get_org_traffic_by_day(org_id, start_time, end_time, get_time_offset())
+        # [(datetime.datetime(2022, 11, 1, 0, 0), 'web-file-upload', 2558798),
+        #  (datetime.datetime(2022, 11, 2, 0, 0), 'web-file-upload', 48659279),
+        #  (datetime.datetime(2022, 11, 3, 0, 0), 'link-file-download', 48658882),
+        #  (datetime.datetime(2022, 11, 3, 0, 0), 'web-file-upload', 24329441)]
+        for e in data:
+            dt, op_type, count = e
+            init_data[dt].update({op_type: count})
+
+        res_data = []
+        for k, v in list(init_data.items()):
+            res = {'datetime': datetime_to_isoformat_timestr(k)}
+            res.update(v)
+            res_data.append(res)
+
+        return Response(sorted(res_data, key=lambda x: x['datetime']))
+
+
+class OrgUserTrafficView(APIView):
+
+    authentication_classes = (TokenAuthentication, SessionAuthentication)
+    throttle_classes = (UserRateThrottle,)
+    permission_classes = (IsProVersion, IsOrgAdminUser)
+
+    def get(self, request, org_id):
+
+        month = request.GET.get("month", "")
+        if not month:
+            error_msg = "month invalid."
+            return api_error(status.HTTP_400_BAD_REQUEST, error_msg)
+
+        try:
+            month_obj = datetime.datetime.strptime(month, "%Y%m")
+        except Exception as e:
+            logger.error(e)
+            error_msg = "month %s invalid" % month
+            return api_error(status.HTTP_400_BAD_REQUEST, error_msg)
+
+        try:
+            page = int(request.GET.get('page', '1'))
+            per_page = int(request.GET.get('per_page', '25'))
+        except ValueError:
+            page = 1
+            per_page = 25
+        start = (page - 1) * per_page
+
+        order_by = request.GET.get('order_by', '')
+        filters = [
+            'sync_file_upload', 'sync_file_download',
+            'web_file_upload', 'web_file_download',
+            'link_file_upload', 'link_file_download',
+        ]
+        if order_by not in filters and \
+           order_by not in map(lambda x: x + '_desc', filters):
+            order_by = 'link_file_download_desc'
+
+        # get one more item than per_page, to judge has_next_page
+        try:
+            traffics = seafevents_api.get_all_users_traffic_by_month(month_obj,
+                                                                     start,
+                                                                     start + per_page + 1,
+                                                                     order_by,
+                                                                     org_id)
+        except Exception as e:
+            logger.error(e)
+            error_msg = 'Internal Server Error'
+            return api_error(status.HTTP_500_INTERNAL_SERVER_ERROR, error_msg)
+
+        if len(traffics) == per_page + 1:
+            has_next_page = True
+            traffics = traffics[:per_page]
+        else:
+            has_next_page = False
+
+        user_monthly_traffic_list = []
+        for traffic in traffics:
+            info = {}
+            info['email'] = traffic['user']
+            info['name'] = email2nickname(traffic['user'])
+            info['sync_file_upload'] = traffic['sync_file_upload']
+            info['sync_file_download'] = traffic['sync_file_download']
+            info['web_file_upload'] = traffic['web_file_upload']
+            info['web_file_download'] = traffic['web_file_download']
+            info['link_file_upload'] = traffic['link_file_upload']
+            info['link_file_download'] = traffic['link_file_download']
+            user_monthly_traffic_list.append(info)
+
+        return Response({
+            'user_monthly_traffic_list': user_monthly_traffic_list,
+            'has_next_page': has_next_page
+        })
+
+
+class OrgUserTrafficExcelView(APIView):
+
+    authentication_classes = (TokenAuthentication, SessionAuthentication)
+    throttle_classes = (UserRateThrottle,)
+    permission_classes = (IsProVersion, IsOrgAdminUser)
+
+    def get(self, request, org_id):
+
+        month = request.GET.get("month", "")
+        if not month:
+            error_msg = "month invalid."
+            return api_error(status.HTTP_400_BAD_REQUEST, error_msg)
+
+        try:
+            month_obj = datetime.datetime.strptime(month, "%Y%m")
+        except Exception:
+            error_msg = "Month %s invalid" % month
+            return api_error(status.HTTP_400_BAD_REQUEST, error_msg)
+
+        try:
+            res_data = seafevents_api.get_all_users_traffic_by_month(month_obj,
+                                                                     -1, -1,
+                                                                     org_id=org_id)
+        except Exception as e:
+            logger.error(e)
+            error_msg = 'Internal Server Error'
+            return api_error(status.HTTP_500_INTERNAL_SERVER_ERROR, error_msg)
+
+        data_list = []
+        head = [_("Time"), _("User"), _("Web Download") + ('(MB)'),
+                _("Sync Download") + ('(MB)'), _("Link Download") + ('(MB)'),
+                _("Web Upload") + ('(MB)'), _("Sync Upload") + ('(MB)'),
+                _("Link Upload") + ('(MB)')]
+
+        for data in res_data:
+            web_download = byte_to_mb(data['web_file_download'])
+            sync_download = byte_to_mb(data['sync_file_download'])
+            link_download = byte_to_mb(data['link_file_download'])
+            web_upload = byte_to_mb(data['web_file_upload'])
+            sync_upload = byte_to_mb(data['sync_file_upload'])
+            link_upload = byte_to_mb(data['link_file_upload'])
+
+            row = [month, data['user'], web_download, sync_download,
+                   link_download, web_upload, sync_upload, link_upload]
+
+            data_list.append(row)
+
+        excel_name = "User Traffic %s" % month
+
+        try:
+            wb = write_xls(excel_name, head, data_list)
+        except Exception as e:
+            logger.error(e)
+            error_msg = 'Internal Server Error'
+            return api_error(status.HTTP_500_INTERNAL_SERVER_ERROR, error_msg)
+
+        response = HttpResponse(content_type='application/ms-excel')
+        response['Content-Disposition'] = 'attachment; filename="%s.xlsx"' % excel_name
+        wb.save(response)
+
+        return response
+
+
+class OrgUserStorageExcelView(APIView):
+
+    authentication_classes = (TokenAuthentication, SessionAuthentication)
+    throttle_classes = (UserRateThrottle,)
+    permission_classes = (IsProVersion, IsOrgAdminUser)
+
+    def get(self, request, org_id):
+
+        org_id = int(org_id)
+        org = ccnet_api.get_org_by_id(org_id)
+        all_users = ccnet_api.get_org_users_by_url_prefix(org.url_prefix, -1, -1)
+
+        head = [_("Email"), _("Name"), _("Contact Email"),
+                _("Space Usage") + "(MB)", _("Space Quota") + "(MB)"]
+
+        data_list = []
+        for user in all_users:
+
+            user_email = user.email
+            user_name = email2nickname(user_email)
+            user_contact_email = email2contact_email(user_email)
+
+            _populate_user_quota_usage(user)
+            space_usage_MB = byte_to_mb(user.space_usage)
+            space_quota_MB = byte_to_mb(user.space_quota)
+
+            row = [user_email, user_name, user_contact_email,
+                   space_usage_MB, space_quota_MB]
+
+            data_list.append(row)
+
+        excel_name = 'User Storage'
+        try:
+            wb = write_xls('users', head, data_list)
+        except Exception as e:
+            logger.error(e)
+            error_msg = 'Internal Server Error'
+            return api_error(status.HTTP_500_INTERNAL_SERVER_ERROR, error_msg)
+
+        response = HttpResponse(content_type='application/ms-excel')
+        response['Content-Disposition'] = 'attachment; filename="%s.xlsx"' % excel_name
+        wb.save(response)
+
+        return response
diff --git a/seahub/organizations/api/admin/users.py b/seahub/organizations/api/admin/users.py
index 9afaa660e3..5eb3649e55 100644
--- a/seahub/organizations/api/admin/users.py
+++ b/seahub/organizations/api/admin/users.py
@@ -1,5 +1,7 @@
 # Copyright (c) 2012-2016 Seafile Ltd.
 import logging
+from io import BytesIO
+from openpyxl import load_workbook
 
 from rest_framework import status
 from rest_framework.views import APIView
@@ -19,8 +21,10 @@ from seahub.base.models import UserLastLogin
 from seahub.base.templatetags.seahub_tags import email2nickname, email2contact_email
 from seahub.profile.models import Profile
 from seahub.settings import SEND_EMAIL_ON_ADDING_SYSTEM_MEMBER
-from seahub.utils import is_valid_email, IS_EMAIL_CONFIGURED
+from seahub.utils import is_valid_email, IS_EMAIL_CONFIGURED, \
+        get_file_type_and_ext
 from seahub.utils.file_size import get_file_size_unit
+from seahub.utils.error_msg import file_type_error_msg
 from seahub.utils.timeutils import timestamp_to_isoformat_timestr, datetime_to_isoformat_timestr
 from seahub.utils.licenseparse import user_number_over_limit
 from seahub.views.sysadmin import send_user_add_mail
@@ -44,8 +48,8 @@ class OrgAdminUsers(APIView):
     throttle_classes = (UserRateThrottle,)
     permission_classes = (IsProVersion, IsOrgAdminUser)
 
-    def get_info_of_users_order_by_quota_usage(self, org, all_users, direction,
-            page, per_page):
+    def get_info_of_users_order_by_quota_usage(self, org, all_users,
+                                               direction, page, per_page):
 
         # get user's quota usage info
         user_usage_dict = {}
@@ -145,8 +149,11 @@ class OrgAdminUsers(APIView):
                     return api_error(status.HTTP_400_BAD_REQUEST, error_msg)
 
                 try:
-                    data = self.get_info_of_users_order_by_quota_usage(org, all_users, direction,
-                            current_page, per_page)
+                    data = self.get_info_of_users_order_by_quota_usage(org,
+                                                                       all_users,
+                                                                       direction,
+                                                                       current_page,
+                                                                       per_page)
                 except Exception as e:
                     logger.error(e)
                     error_msg = 'Internal Server Error'
@@ -201,7 +208,6 @@ class OrgAdminUsers(APIView):
                 'page_next': page_next
             })
 
-
     def post(self, request, org_id):
         """Added an organization user, check member quota before adding.
         """
@@ -282,7 +288,7 @@ class OrgAdminUsers(APIView):
         user_info['email'] = user.email
         user_info['contact_email'] = email2contact_email(user.email)
         user_info['last_login'] = None
-        user_info['self_usage'] = 0 # get_org_user_self_usage(org.org_id, user.email)
+        user_info['self_usage'] = 0  # get_org_user_self_usage(org.org_id, user.email)
         try:
             user_info['quota'] = get_org_user_quota(org_id, user.email)
         except SearpcError as e:
@@ -291,6 +297,7 @@ class OrgAdminUsers(APIView):
 
         user_info['quota_usage'] = user_info['self_usage']
         user_info['quota_total'] = user_info['quota']
+        user_info['create_time'] = user_info['ctime']
 
         return Response(user_info)
 
@@ -589,3 +596,161 @@ class OrgAdminSearchUser(APIView):
             user_list.append(user_info)
 
         return Response({'user_list': user_list})
+
+
+class OrgAdminImportUsers(APIView):
+    authentication_classes = (TokenAuthentication, SessionAuthentication)
+    throttle_classes = (UserRateThrottle,)
+    permission_classes = (IsProVersion, IsOrgAdminUser)
+
+    def post(self, request, org_id):
+        """ Import users from xlsx file
+
+        Permission checking:
+        1. admin user.
+        """
+
+        # resource check
+        org_id = int(org_id)
+        if not ccnet_api.get_org_by_id(org_id):
+            error_msg = 'Organization %s not found.' % org_id
+            return api_error(status.HTTP_404_NOT_FOUND, error_msg)
+
+        # check plan
+        url_prefix = request.user.org.url_prefix
+        org_members = len(ccnet_api.get_org_users_by_url_prefix(url_prefix, -1, -1))
+
+        if ORG_MEMBER_QUOTA_ENABLED:
+            from seahub.organizations.models import OrgMemberQuota
+            org_members_quota = OrgMemberQuota.objects.get_quota(request.user.org.org_id)
+            if org_members_quota is not None and org_members >= org_members_quota:
+                err_msg = 'Failed. You can only invite %d members.' % org_members_quota
+                return api_error(status.HTTP_403_FORBIDDEN, err_msg)
+
+        xlsx_file = request.FILES.get('file', None)
+        if not xlsx_file:
+            error_msg = 'file can not be found.'
+            return api_error(status.HTTP_400_BAD_REQUEST, error_msg)
+
+        file_type, ext = get_file_type_and_ext(xlsx_file.name)
+        if ext != 'xlsx':
+            error_msg = file_type_error_msg(ext, 'xlsx')
+            return api_error(status.HTTP_400_BAD_REQUEST, error_msg)
+
+        content = xlsx_file.read()
+
+        try:
+            fs = BytesIO(content)
+            wb = load_workbook(filename=fs, read_only=True)
+        except Exception as e:
+            logger.error(e)
+
+        # example file is like:
+        # Email    Password Name(Optional) Space Quota(MB, Optional)
+        # a@a.com  a        a              1024
+        # b@b.com  b        b              2048
+
+        rows = wb.worksheets[0].rows
+        records = []
+
+        # skip first row(head field).
+        next(rows)
+        for row in rows:
+            if not all(col.value is None for col in row):
+                records.append([col.value for col in row])
+
+        if user_number_over_limit(new_users=len(records)):
+            error_msg = 'The number of users exceeds the limit.'
+            return api_error(status.HTTP_400_BAD_REQUEST, error_msg)
+
+        result = {}
+        result['failed'] = []
+        result['success'] = []
+        for record in records:
+            if record[0]:
+                email = record[0].strip()
+                if not is_valid_email(email):
+                    result['failed'].append({
+                        'email': email,
+                        'error_msg': 'email %s invalid.' % email
+                    })
+                    continue
+            else:
+                result['failed'].append({
+                    'email': '',
+                    'error_msg': 'email invalid.'
+                })
+                continue
+
+            if not record[1] or not record[1].strip():
+                result['failed'].append({
+                    'email': email,
+                    'error_msg': 'password invalid.'
+                })
+                continue
+            else:
+                password = record[1].strip()
+
+            try:
+                User.objects.get(email=email)
+                result['failed'].append({
+                    'email': email,
+                    'error_msg': 'user %s exists.' % email
+                })
+                continue
+            except User.DoesNotExist:
+                pass
+
+            User.objects.create_user(email, password, is_staff=False, is_active=True)
+            set_org_user(org_id, email)
+
+            if IS_EMAIL_CONFIGURED:
+                if SEND_EMAIL_ON_ADDING_SYSTEM_MEMBER:
+                    try:
+                        send_user_add_mail(request, email, password)
+                    except Exception as e:
+                        logger.error(str(e))
+
+            # update the user's optional info
+            # update nikename
+            if record[2]:
+                try:
+                    nickname = record[2].strip()
+                    if len(nickname) <= 64 and '/' not in nickname:
+                        Profile.objects.add_or_update(email, nickname, '')
+                except Exception as e:
+                    logger.error(e)
+
+            # update quota
+            if record[3]:
+                try:
+                    space_quota_mb = int(record[3])
+                    if space_quota_mb >= 0:
+                        space_quota = int(space_quota_mb) * get_file_size_unit('MB')
+                        seafile_api.set_org_user_quota(org_id, email, space_quota)
+                except Exception as e:
+                    logger.error(e)
+
+            user = User.objects.get(email=email)
+
+            info = {}
+            info['email'] = email
+            info['name'] = email2nickname(email)
+            info['contact_email'] = email2contact_email(email)
+
+            info['is_staff'] = user.is_staff
+            info['is_active'] = user.is_active
+
+            info['quota_usage'] = 0
+            try:
+                info['quota_total'] = get_org_user_quota(org_id, email)
+            except SearpcError as e:
+                logger.error(e)
+                info['quota_total'] = -1
+
+            info['create_time'] = timestamp_to_isoformat_timestr(user.ctime)
+            info['last_login'] = None
+
+            result['success'].append(info)
+
+        return Response(result)
diff --git a/seahub/organizations/api_urls.py b/seahub/organizations/api_urls.py
index d22e169ed6..72036f9235 100644
--- a/seahub/organizations/api_urls.py
+++ b/seahub/organizations/api_urls.py
@@ -10,7 +10,8 @@ from .api.group_owned_libraries import (
     AdminGroupOwnedLibraries, AdminGroupOwnedLibrary
 )
 from .api.group_members import AdminGroupMembers, AdminGroupMember
-from .api.admin.users import OrgAdminUser, OrgAdminUsers, OrgAdminSearchUser
+from .api.admin.users import OrgAdminUser, OrgAdminUsers, OrgAdminSearchUser, \
+        OrgAdminImportUsers
 from .api.admin.user_set_password import OrgAdminUserSetPassword
 from .api.admin.groups import OrgAdminGroups, OrgAdminGroup, OrgAdminSearchGroup
 from .api.admin.repos import OrgAdminRepos, OrgAdminRepo
@@ -19,7 +20,38 @@ from .api.admin.links import OrgAdminLinks, OrgAdminLink
 from .api.admin.logs import OrgAdminLogsFileAccess, OrgAdminLogsFileUpdate, OrgAdminLogsPermAudit
 from .api.admin.user_repos import OrgAdminUserRepos, OrgAdminUserBesharedRepos
 
+from .api.admin.devices import OrgAdminDevices, OrgAdminDevicesErrors
+
+from .api.admin.statistics import OrgFileOperationsView, OrgTotalStorageView, \
+        OrgActiveUsersView, OrgSystemTrafficView, OrgUserTrafficView, \
+        OrgUserTrafficExcelView, OrgUserStorageExcelView
+
 urlpatterns = [
+    url(r'^(?P<org_id>\d+)/admin/statistics/file-operations/$',
+        OrgFileOperationsView.as_view(),
+        name='api-v2.1-org-admin-statistics-file-operations'),
+    url(r'^(?P<org_id>\d+)/admin/statistics/total-storage/$',
+        OrgTotalStorageView.as_view(),
+        name='api-v2.1-org-admin-statistics-total-storage'),
+    url(r'^(?P<org_id>\d+)/admin/statistics/active-users/$',
+        OrgActiveUsersView.as_view(),
+        name='api-v2.1-org-admin-statistics-active-users'),
+    url(r'^(?P<org_id>\d+)/admin/statistics/system-traffic/$',
+        OrgSystemTrafficView.as_view(),
+        name='api-v2.1-org-admin-statistics-system-traffic'),
+    url(r'^(?P<org_id>\d+)/admin/statistics/user-traffic/$',
+        OrgUserTrafficView.as_view(),
+        name='api-v2.1-org-admin-statistics-user-traffic'),
+    url(r'^(?P<org_id>\d+)/admin/statistics/user-traffic/excel/$',
+        OrgUserTrafficExcelView.as_view(),
+        name='api-v2.1-org-admin-statistics-user-traffic-excel'),
+    url(r'^(?P<org_id>\d+)/admin/statistics/user-storage/excel/$',
+        OrgUserStorageExcelView.as_view(),
+        name='api-v2.1-org-admin-statistics-user-storage-excel'),
+
+    url(r'^(?P<org_id>\d+)/admin/devices/$', OrgAdminDevices.as_view(), name='api-v2.1-org-admin-devices'),
+    url(r'^(?P<org_id>\d+)/admin/devices-errors/$', OrgAdminDevicesErrors.as_view(), name='api-v2.1-org-admin-devices-errors'),
+
     url(r'^(?P<org_id>\d+)/admin/address-book/groups/$', AdminAddressBookGroups.as_view(), name='api-admin-address-book-groups'),
     url(r'^(?P<org_id>\d+)/admin/address-book/groups/(?P<group_id>\d+)/$', AdminAddressBookGroup.as_view(), name='api-admin-address-book-group'),
 
@@ -35,6 +67,7 @@ urlpatterns = [
     url(r'^(?P<org_id>\d+)/admin/groups/(?P<group_id>\d+)/members/$', AdminGroupMembers.as_view(), name='api-admin-group-members'),
     url(r'^(?P<org_id>\d+)/admin/groups/(?P<group_id>\d+)/members/(?P<email>[^/]+)/$', AdminGroupMember.as_view(), name='api-admin-group-member'),
     url(r'^(?P<org_id>\d+)/admin/users/$', OrgAdminUsers.as_view(), name='api-v2.1-org-admin-users'),
+    url(r'^(?P<org_id>\d+)/admin/import-users/$', OrgAdminImportUsers.as_view(), name='api-v2.1-org-admin-import-users'),
     url(r'^(?P<org_id>\d+)/admin/search-user/$', OrgAdminSearchUser.as_view(), name='api-v2.1-org-admin-search-user'),
     url(r'^(?P<org_id>\d+)/admin/users/(?P<email>[^/]+)/$', OrgAdminUser.as_view(), name='api-v2.1-org-admin-user'),
     url(r'^(?P<org_id>\d+)/admin/users/(?P<email>[^/]+)/set-password/', OrgAdminUserSetPassword.as_view(), name='api-v2.1-org-admin-user-reset-password'),
diff --git a/seahub/organizations/urls.py b/seahub/organizations/urls.py
index c9281475b4..2defabd852 100644
--- a/seahub/organizations/urls.py
+++ b/seahub/organizations/urls.py
@@ -7,6 +7,15 @@ urlpatterns = [
     url(r'^add/$', org_add, name='org_add'),
     url(r'^register/$', org_register, name='org_register'),
 
+    url(r'^statistics-admin/file/$', react_fake_view, name='org_statistics_admin_file'),
+    url(r'^statistics-admin/total-storage/$', react_fake_view, name='org_statistics_admin_total_storage'),
+    url(r'^statistics-admin/active-users/$', react_fake_view, name='org_statistics_admin_active_users'),
+    url(r'^statistics-admin/traffic/$', react_fake_view, name='org_statistics_admin_traffic'),
+
+    url(r'^deviceadmin/desktop-devices/$', react_fake_view, name='org_device_admin'),
+    url(r'^deviceadmin/mobile-devices/$', react_fake_view, name='org_device_admin_mobile_devices'),
+    url(r'^deviceadmin/devices-errors/$', react_fake_view, name='org_device_admin_devices_errors'),
+
     url(r'^useradmin/$', react_fake_view, name='org_user_admin'),
     url(r'^useradmin/search-users/$', react_fake_view, name='org_user_admin_search_users'),
     url(r'^useradmin/admins/$', react_fake_view, name='org_useradmin_admins'),
@@ -25,7 +34,7 @@ urlpatterns = [
     url(r'^logadmin/file-update/$', react_fake_view, name='org_log_file_update'),
     url(r'^logadmin/perm-audit/$', react_fake_view, name='org_log_perm_audit'),
 
-    url(r'^orgmanage/$', react_fake_view, name='org_manage'),
+    url(r'^info/$', react_fake_view, name='org_info'),
     url(r'^departmentadmin/$', react_fake_view, name='org_department_admin'),
     url(r'^departmentadmin/groups/(?P<group_id>\d+)/', react_fake_view, name='org_department_admin'),
     url(r'^associate/(?P<token>.+)/$', org_associate, name='org_associate'),
diff --git a/seahub/utils/__init__.py b/seahub/utils/__init__.py
index 1fe301a9bd..6f967e9e9c 100644
--- a/seahub/utils/__init__.py
+++ b/seahub/utils/__init__.py
@@ -703,6 +703,12 @@ if EVENTS_CONFIG_FILE:
             res = seafevents.get_user_activity_stats_by_day(session, start, end, offset)
         return res
 
+    def get_org_user_activity_stats_by_day(org_id, start, end):
+        """
+        """
+        res = seafevents_api.get_org_user_activity_stats_by_day(org_id, start, end)
+        return res
+
     def get_org_user_events(org_id, username, start, count):
         return _get_events(username, start, count, org_id=org_id)
 
@@ -773,6 +779,12 @@ if EVENTS_CONFIG_FILE:
             res = seafevents.get_file_ops_stats_by_day(session, start, end, offset)
         return res
 
+    def get_org_file_ops_stats_by_day(org_id, start, end, offset):
+        """ return file audit record of sepcifiy time group by day.
+        """
+        res = seafevents_api.get_org_file_ops_stats_by_day(org_id, start, end, offset)
+        return res
+
     def get_total_storage_stats_by_day(start, end, offset):
         """
         """
@@ -780,6 +792,12 @@ if EVENTS_CONFIG_FILE:
             res = seafevents.get_total_storage_stats_by_day(session, start, end, offset)
         return res
 
+    def get_org_total_storage_stats_by_day(org_id, start, end, offset):
+        """
+        """
+        res = seafevents_api.get_org_storage_stats_by_day(org_id, start, end, offset)
+        return res
+
     def get_system_traffic_by_day(start, end, offset, op_type='all'):
         with _get_seafevents_session() as session:
             res = seafevents.get_system_traffic_by_day(session, start, end, offset, op_type)
@@ -848,6 +866,8 @@ else:
         pass
     def get_user_activity_stats_by_day():
         pass
+    def get_org_user_activity_stats_by_day():
+        pass
     def get_log_events_by_time():
         pass
     def get_org_user_events():
@@ -864,10 +884,16 @@ else:
         pass
     def get_file_ops_stats_by_day():
         pass
+    def get_org_file_ops_stats_by_day():
+        pass
     def get_total_storage_stats_by_day():
         pass
+    def get_org_total_storage_stats_by_day():
+        pass
     def get_system_traffic_by_day():
         pass
+    def get_org_system_traffic_by_day():
+        pass
     def get_org_traffic_by_day():
         pass
     def get_file_update_events():
diff --git a/seahub/views/sysadmin.py b/seahub/views/sysadmin.py
index b90759db45..834b569da9 100644
--- a/seahub/views/sysadmin.py
+++ b/seahub/views/sysadmin.py
@@ -50,7 +50,7 @@ from seahub.utils import IS_EMAIL_CONFIGURED, string2list, is_valid_username, \
     is_pro_version, send_html_email, \
     get_server_id, delete_virus_file, get_virus_file_by_vid, \
     get_virus_files, FILE_AUDIT_ENABLED, get_max_upload_file_size, \
-    get_site_name, seafevents_api
+    get_site_name, seafevents_api, is_org_context
 from seahub.utils.ip import get_remote_ip
 from seahub.utils.file_size import get_file_size_unit
 from seahub.utils.ldap import get_ldap_info
@@ -779,7 +779,6 @@ def batch_user_make_admin(request):
     return HttpResponse(json.dumps({'success': True,}), content_type=content_type)
 
 @login_required
-@sys_staff_required
 def batch_add_user_example(request):
     """ get example file.
     """
@@ -787,20 +786,32 @@ def batch_add_user_example(request):
     if not next_page:
         next_page = SITE_ROOT
     data_list = []
-    head = [_('Email'),
-            _('Password'),
-            _('Name') + '(' + _('Optional') + ')',
-            _('Role') + '(' + _('Optional') + ')',
-            _('Space Quota') + '(MB, ' + _('Optional') + ')',
-            'Login ID']
-    for i in range(5):
-        username = "test" + str(i) + "@example.com"
-        password = "123456"
-        name = "test" + str(i)
-        role = "default"
-        quota = "1000"
-        login_id = "login id " + str(i)
-        data_list.append([username, password, name, role, quota, login_id])
+    if not is_org_context(request):
+        head = [_('Email'),
+                _('Password'),
+                _('Name') + '(' + _('Optional') + ')',
+                _('Role') + '(' + _('Optional') + ')',
+                _('Space Quota') + '(MB, ' + _('Optional') + ')',
+                'Login ID']
+        for i in range(5):
+            username = "test" + str(i) + "@example.com"
+            password = "123456"
+            name = "test" + str(i)
+            role = "default"
+            quota = "1000"
+            login_id = "login id " + str(i)
+            data_list.append([username, password, name, role, quota, login_id])
+    else:
+        head = [_('Email'),
+                _('Password'),
+                _('Name') + '(' + _('Optional') + ')',
+                _('Space Quota') + '(MB, ' + _('Optional') + ')']
+        for i in range(5):
+            username = "test" + str(i) + "@example.com"
+            password = "123456"
+            name = "test" + str(i)
+            quota = "1000"
+            data_list.append([username, password, name, quota])
 
     wb = write_xls('sample', head, data_list)
     if not wb: