diff --git a/pilot/server/webserver.py b/pilot/server/webserver.py
index 4468082d8..4bf0d0eb4 100644
--- a/pilot/server/webserver.py
+++ b/pilot/server/webserver.py
@@ -236,6 +236,12 @@ pre {
     """
 )
 
+def change_mode(mode):
+    if mode == "默认知识库对话":
+        return gr.update(visible=False)
+    else:
+        return gr.update(visible=True)
+
 
 def build_single_model_ui():
    
@@ -249,6 +255,7 @@ def build_single_model_ui():
         The service is a research preview intended for non-commercial use only. subject to the model [License](https://github.com/facebookresearch/llama/blob/main/MODEL_CARD.md) of LLaMA 
     """
 
+    vs_path, file_status, vs_list = gr.State(""), gr.State(""), gr.State(vs_list)
     state = gr.State()
     gr.Markdown(notice_markdown, elem_id="notice_markdown")
 
@@ -270,10 +277,16 @@ def build_single_model_ui():
             interactive=True,
             label="最大输出Token数",
         )
-
-    with gr.Tabs():
+    tabs = gr.Tabs()
+    with tabs:
         with gr.TabItem("知识问答", elem_id="QA"):
-           pass
+            doc2vec = gr.Column(visible=False)
+            with doc2vec:
+                mode = gr.Radio(["默认知识库对话", "新增知识库"])
+                vs_setting = gr.Accordion("配置知识库")
+                mode.change(fn=change_mode, inputs=mode, outputs=vs_setting)
+                with vs_setting:
+                    select_vs = gr.Dropdown()
         with gr.TabItem("SQL生成与诊断", elem_id="SQL"):
             # TODO A selector to choose database
             with gr.Row(elem_id="db_selector"):
@@ -300,6 +313,10 @@ def build_single_model_ui():
         regenerate_btn = gr.Button(value="重新生成", interactive=False)
         clear_btn = gr.Button(value="清理", interactive=False)
 
+    # QA 模式下清空数据库选项
+    if tabs.elem_id == "QA":
+        db_selector = ""
+
     gr.Markdown(learn_more_markdown)
 
     btn_list = [regenerate_btn, clear_btn]
diff --git a/pilot/vector_store/extract_tovec.py b/pilot/vector_store/extract_tovec.py
index 5b7df3eb2..2581b0264 100644
--- a/pilot/vector_store/extract_tovec.py
+++ b/pilot/vector_store/extract_tovec.py
@@ -1,12 +1,13 @@
 #!/usr/bin/env python3
 # -*- coding:utf-8 -*-
 
+import os
 
 from langchain.text_splitter import CharacterTextSplitter
 from langchain.vectorstores import Chroma
 from pilot.model.vicuna_llm import VicunaEmbeddingLLM
-# from langchain.embeddings import SentenceTransformerEmbeddings
-
+from pilot.configs.model_config import VECTORE_PATH
+from langchain.embeddings import HuggingFaceEmbeddings
 
 embeddings = VicunaEmbeddingLLM()
 
@@ -21,18 +22,22 @@ def knownledge_tovec(filename):
     )
     return docsearch
 
+def knownledge_tovec_st(filename):
+    """ Use sentence transformers to embedding the document.
+        https://github.com/UKPLab/sentence-transformers
+    """
+    from pilot.configs.model_config import llm_model_config
+    embeddings = HuggingFaceEmbeddings(model=llm_model_config["sentence-transforms"])
 
-# def knownledge_tovec_st(filename):
-#     """ Use sentence transformers to embedding the document.
-#         https://github.com/UKPLab/sentence-transformers
-#     """
-#     from pilot.configs.model_config import llm_model_config
-#     embeddings = SentenceTransformerEmbeddings(model=llm_model_config["sentence-transforms"])
-
-#     with open(filename, "r") as f:
-#         knownledge = f.read()
+    with open(filename, "r") as f:
+        knownledge = f.read()
     
-#     text_splitter = CharacterTextSplitter(chunk_size=1000, chunk_overlap=0)
-#     texts = text_splitter(knownledge)
-#     docsearch = Chroma.from_texts(texts, embeddings, metadatas=[{"source": str(i)} for i in range(len(texts))])
-#     return docsearch
+    text_splitter = CharacterTextSplitter(chunk_size=1000, chunk_overlap=0)
+    texts = text_splitter(knownledge)
+    docsearch = Chroma.from_texts(texts, embeddings, metadatas=[{"source": str(i)} for i in range(len(texts))])
+    return docsearch
+
+def get_vector_storelist():
+    if not os.path.exists(VECTORE_PATH):
+        return []
+    return os.listdir(VECTORE_PATH)
\ No newline at end of file