diff --git a/group/forms.py b/group/forms.py
index 7778ff6e42..476a109bf8 100644
--- a/group/forms.py
+++ b/group/forms.py
@@ -35,3 +35,13 @@ class GroupAddForm(forms.Form):
             raise forms.ValidationError(error_msg)
         else:
             return group_name
+
+class GroupJoinMsgForm(forms.Form):
+    """
+    A form used to send group join request message.
+    """
+    group_join_msg = forms.CharField(max_length=255, error_messages={
+            'required': u'验证信息不能为空',
+            'max_length': u'验证信息太长，不超过255个字符',
+            })
+
diff --git a/group/templates/group/group_join_email.html b/group/templates/group/group_join_email.html
new file mode 100644
index 0000000000..3fa730c64f
--- /dev/null
+++ b/group/templates/group/group_join_email.html
@@ -0,0 +1,10 @@
+{% autoescape off %}
+亲爱的 {{ staff }}：
+{{ user }} 申请加入群组 {{ group.group_name }}，验证信息：
+{{ group_join_msg }}
+
+感谢使用我们的网站！
+
+Seafile团队
+
+{% endautoescape %}
diff --git a/group/templates/group/group_pubinfo.html b/group/templates/group/group_pubinfo.html
new file mode 100644
index 0000000000..f1ca0afe69
--- /dev/null
+++ b/group/templates/group/group_pubinfo.html
@@ -0,0 +1,64 @@
+{% extends "myhome_base.html" %}
+{% load seahub_tags group_avatar_tags %}
+{% load url from future %}
+
+{% block main_panel %}
+<div class="user-profile narrow-panel ovhd">
+  <div class="pic fleft">
+    <img src="{% grp_avatar_url group.id 48 %}" alt="{{ group.group_name }}的图标" title="{{ group.group_name }}" class="avatar" />
+    <button id="add">申请加入</button>
+  </div>
+
+  <div class="txt fright">
+    <p>名称：{{ group.group_name }}</p>
+    <p>管理员：{{ group.creator_name }}</p>
+    <p>创建于：{{ group.timestamp|tsstr_sec }}</p>
+    <p>人数：{{ members|length }}</p>
+  </div>
+</div>
+
+<form id="group-join-form" class="hide" action="" method="post">
+  <label>验证信息：</label><br />
+  <textarea id="id_group_join_msg" name="group_join_msg"></textarea><br />
+  <p class="error hide"></p>
+  <input type="submit" value="提交" id="group-join-submit" />
+</form>
+{% endblock %}
+
+{% block extra_script %}
+<script type="text/javascript">
+$('#add').click(function() {
+    $('#group-join-form').modal({appendTo: '#main'});
+});
+
+$('#group-join-submit').click(function() {
+    $.ajax({
+        url: '{% url 'group_joinrequest' group.id %}',
+        type: 'POST',
+        dataType: 'json',
+        cache: 'false',
+        beforeSend: prepareCSRFToken,
+        data: {
+            'group_join_msg': $('#id_group_join_msg').val(),
+        },
+        success: function(data) {
+            location.reload(true);
+        },
+        error: function(data, textStatus, jqXHR) {
+            var errors = $.parseJSON(data.responseText);
+            $.each(errors, function(index, value) {
+                if (index == 'error') {
+                    apply_form_error('group-join-form', value);
+                } else {
+                    apply_form_error('group-join-form', value[0]);
+                }
+            });
+        }
+    });
+
+    return false;
+});
+
+
+</script>
+{% endblock %}
diff --git a/group/urls.py b/group/urls.py
index f8a41cc1a7..ab6b6cec7b 100644
--- a/group/urls.py
+++ b/group/urls.py
@@ -2,7 +2,7 @@ from django.conf.urls.defaults import *
 
 from views import group_info, group_member_operations, \
     group_members, msg_reply, msg_reply_new, group_recommend, \
-    create_group_repo
+    create_group_repo, group_joinrequest
 
 urlpatterns = patterns('',
     url(r'^(?P<group_id>[\d]+)/$', group_info, name='group_info'),
@@ -12,4 +12,5 @@ urlpatterns = patterns('',
     url(r'^(?P<group_id>[\d]+)/create-repo/$', create_group_repo, name='create_group_repo'),
     (r'^(?P<group_id>[\d]+)/member/(?P<user_name>[^/]+)/$', group_member_operations),
     url(r'^recommend/$', group_recommend, name='group_recommend'),
+    url(r'^joinrequest/(?P<group_id>[\d]+)/$', group_joinrequest, name='group_joinrequest'),
 )
diff --git a/group/views.py b/group/views.py
index 205c3aa45e..da96c0bdd2 100644
--- a/group/views.py
+++ b/group/views.py
@@ -25,7 +25,7 @@ from pysearpc import SearpcError
 
 from models import GroupMessage, MessageReply, MessageAttachment, BusinessGroup
 from forms import MessageForm, MessageReplyForm, GroupRecommendForm, \
-    GroupAddForm
+    GroupAddForm, GroupJoinMsgForm
 from signals import grpmsg_added, grpmsg_reply_added
 from base.decorators import ctx_switch_required
 from base.mixins import LoginRequiredMixin
@@ -255,26 +255,27 @@ def render_group_info(request, group_id, form):
                                     msg_type='group_msg',
                                     detail=str(group_id)).delete()
     
-    # Check whether user belongs to the group.
-    joined = is_group_user(group_id_int, request.user.username)
-    
-    if not joined and not request.user.is_staff:
-        return render_error(request, u'未加入该群组')
-
-    # if request.user.org and not request.user.org.is_staff:
-    #     return render_error(request, u'未加入该群组')
-
     group = get_group(group_id)
     if not group:
         return HttpResponseRedirect(reverse('group_list', args=[]))
 
+    # Get all group members.
+    members = get_group_members(group_id_int)
+    
+    # Check whether user belongs to the group.
+    joined = is_group_user(group_id_int, request.user.username)
+    if not joined and not request.user.is_staff:
+        # Return group public info page.
+        return render_to_response('group/group_pubinfo.html', {
+                'members': members,
+                'group': group,
+                }, context_instance=RequestContext(request))
+
     is_staff = True if check_group_staff(group.id, request.user) else False
         
-    members = get_group_members(group_id_int)
     managers = []
     common_members = []
     for member in members:
-#        member.short_username = member.user_name.split('@')[0]
         if member.is_staff == 1:
             managers.append(member)
         else:
@@ -803,3 +804,55 @@ def create_group_repo(request, group_id):
                 return HttpResponse(json.dumps(result),
                                     content_type=content_type)
 
+@login_required
+def group_joinrequest(request, group_id):
+    """
+    Handle post request to join a group.
+    """
+    if not request.is_ajax() or request.method != 'POST':
+        raise Http404
+
+    result = {}
+    content_type = 'application/json; charset=utf-8'
+
+    group_id = int(group_id)
+    group =get_group(group_id) 
+    if not group:
+        raise Http404
+
+    user = request.user.username
+    # TODO: Group creator is group staff now, but may changed in future.
+    staff = group.creator_name
+    if is_group_user(group_id, user):
+        # Already in the group. Normally, this case should not happen.
+        err = u'你已经在该群组。'
+        return HttpResponseBadRequest(json.dumps({'error': err}),
+                                      content_type=content_type)
+    else:
+        form = GroupJoinMsgForm(request.POST)
+        if form.is_valid():
+            group_join_msg = form.cleaned_data['group_join_msg']
+            # Send the message to group staff.
+            use_https = request.is_secure()
+            domain = RequestSite(request).domain
+            t = loader.get_template('group/group_join_email.html')
+            c = {
+                'staff': staff,
+                'user': user,
+                'group': group,
+                'group_join_msg': group_join_msg,
+                }
+            try:
+                send_mail(u'加入群组申请', t.render(Context(c)), None, [staff],
+                          fail_silently=False)
+                messages.success(request, u'发送成功，等候群组管理员处理。')
+                return HttpResponse(json.dumps('success'),
+                                    content_type=content_type)
+            except:
+                err = u'发送失败，请稍后再试。'
+                return HttpResponse(json.dumps({'error': err}), status=500,
+                                    content_type=content_type)
+        else:
+            return HttpResponseBadRequest(json.dumps(form.errors),
+                                          content_type=content_type)
+        
diff --git a/media/css/seahub.css b/media/css/seahub.css
index 33d4f50d6e..7bb99b4248 100644
--- a/media/css/seahub.css
+++ b/media/css/seahub.css
@@ -885,6 +885,12 @@ ul.with-bg li {
     width:262px;
     margin:5px 0;
 }
+/* group-join-form */
+#id_group_join_msg {
+    width:260px;
+    height:80px;
+}
+
 #recommend-msg,
 #recommend-groups {
     width:450px;