diff --git a/backend/apps/api.py b/backend/apps/api.py
index 478d86b3..e11cd90b 100644
--- a/backend/apps/api.py
+++ b/backend/apps/api.py
@@ -3,6 +3,7 @@ from fastapi import APIRouter
 from apps.system.api import login, user, aimodel
 from apps.settings.api import terminology
 from apps.datasource.api import datasource
+from apps.chat.api import chat
 
 
 api_router = APIRouter()
@@ -11,5 +12,6 @@ api_router.include_router(user.router)
 api_router.include_router(aimodel.router)
 api_router.include_router(terminology.router)
 api_router.include_router(datasource.router)
+api_router.include_router(chat.router)
 
 
diff --git a/backend/apps/chat/__init__.py b/backend/apps/chat/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/backend/apps/chat/api/__init__.py b/backend/apps/chat/api/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/backend/apps/chat/api/chat.py b/backend/apps/chat/api/chat.py
new file mode 100644
index 00000000..3a6d723c
--- /dev/null
+++ b/backend/apps/chat/api/chat.py
@@ -0,0 +1,53 @@
+from fastapi import APIRouter, HTTPException
+from sqlmodel import select
+from apps.chat.schemas.chat_base_schema import LLMConfig
+from apps.chat.schemas.chat_schema import ChatQuestion
+from apps.chat.schemas.llm import LLMService
+from apps.system.models.system_modle import AiModelDetail
+from common.core.deps import SessionDep
+# from sse_starlette.sse import EventSourceResponse
+router = APIRouter(tags=["Data Q&A"], prefix="/chat")
+
+
+@router.post("/question")
+async def stream_sql(session: SessionDep, requestQuestion: ChatQuestion):
+    question = requestQuestion.question
+    
+    # Use OpenAI model
+    """ openai_config = LLMConfig(
+        model_type="openai",
+        model_name="gpt-4",
+        api_key="your-api-key",
+        additional_params={"temperature": 0.7}
+    )
+    openai_service = LLMService(openai_config) """
+
+    aimodel = session.exec(select(AiModelDetail).where(AiModelDetail.status == True, AiModelDetail.api_key.is_not(None))).first()
+    
+    if not aimodel:
+        raise HTTPException(
+            status_code=400,
+            detail="No available AI model configuration found"
+        )
+    
+    # Use Tongyi Qianwen
+    tongyi_config = LLMConfig(
+        model_type="tongyi",
+        model_name=aimodel.name,
+        api_key=aimodel.api_key,
+        additional_params={"temperature": aimodel.temperature}
+    )
+    llm_service = LLMService(tongyi_config)
+
+    # Use Custom VLLM model
+    """ vllm_config = LLMConfig(
+        model_type="vllm",
+        model_name="your-model-path",
+        additional_params={
+            "max_new_tokens": 200,
+            "temperature": 0.3
+        }
+    )
+    vllm_service = LLMService(vllm_config) """
+    result = llm_service.generate_sql(question)
+    return result
\ No newline at end of file
diff --git a/backend/apps/chat/schemas/__init__.py b/backend/apps/chat/schemas/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/backend/apps/chat/schemas/chat_base_schema.py b/backend/apps/chat/schemas/chat_base_schema.py
new file mode 100644
index 00000000..b5cb540e
--- /dev/null
+++ b/backend/apps/chat/schemas/chat_base_schema.py
@@ -0,0 +1,86 @@
+from pydantic import BaseModel
+from typing import Optional, Dict, Any, Type
+from abc import ABC, abstractmethod
+from langchain_core.language_models import BaseLLM as LangchainBaseLLM
+from langchain_openai import ChatOpenAI
+from langchain_community.llms import Tongyi, VLLM
+
+class LLMConfig(BaseModel):
+    """Base configuration class for large language models"""
+    model_type: str  # Model type: openai/tongyi/vllm etc.
+    model_name: str  # Specific model name
+    api_key: Optional[str] = None
+    api_base_url: Optional[str] = None
+    additional_params: Dict[str, Any] = {}
+    
+
+class BaseLLM(ABC):
+    """Abstract base class for large language models"""
+    
+    def __init__(self, config: LLMConfig):
+        self.config = config
+        self._llm = self._init_llm()
+    
+    @abstractmethod
+    def _init_llm(self) -> LangchainBaseLLM:
+        """Initialize specific large language model instance"""
+        pass
+    
+    @property
+    def llm(self) -> LangchainBaseLLM:
+        """Return the langchain LLM instance"""
+        return self._llm
+
+class OpenAILLM(BaseLLM):
+    def _init_llm(self) -> LangchainBaseLLM:
+        return ChatOpenAI(
+            model=self.config.model_name,
+            api_key=self.config.api_key,
+            **self.config.additional_params
+        )
+    
+    def generate(self, prompt: str) -> str:
+        return self.llm.invoke(prompt)
+
+class TongyiLLM(BaseLLM):
+    def _init_llm(self) -> LangchainBaseLLM:
+        return Tongyi(
+            model_name=self.config.model_name,
+            dashscope_api_key=self.config.api_key,
+            **self.config.additional_params
+        )
+    
+    def generate(self, prompt: str) -> str:
+        return self.llm.invoke(prompt)
+
+class VLLMLLM(BaseLLM):
+    def _init_llm(self) -> LangchainBaseLLM:
+        return VLLM(
+            model=self.config.model_name,
+            **self.config.additional_params
+        )
+    
+    def generate(self, prompt: str) -> str:
+        return self.llm.invoke(prompt)
+
+
+class LLMFactory:
+    """Large Language Model Factory Class"""
+    
+    _llm_types: Dict[str, Type[BaseLLM]] = {
+        "openai": OpenAILLM,
+        "tongyi": TongyiLLM,
+        "vllm": VLLMLLM
+    }
+    
+    @classmethod
+    def create_llm(cls, config: LLMConfig) -> BaseLLM:
+        llm_class = cls._llm_types.get(config.model_type)
+        if not llm_class:
+            raise ValueError(f"Unsupported LLM type: {config.model_type}")
+        return llm_class(config)
+    
+    @classmethod
+    def register_llm(cls, model_type: str, llm_class: Type[BaseLLM]):
+        """Register new model type"""
+        cls._llm_types[model_type] = llm_class
\ No newline at end of file
diff --git a/backend/apps/chat/schemas/chat_schema.py b/backend/apps/chat/schemas/chat_schema.py
new file mode 100644
index 00000000..607e5f54
--- /dev/null
+++ b/backend/apps/chat/schemas/chat_schema.py
@@ -0,0 +1,6 @@
+
+from pydantic import BaseModel
+
+
+class ChatQuestion(BaseModel):
+    question: str
\ No newline at end of file
diff --git a/backend/apps/chat/schemas/llm.py b/backend/apps/chat/schemas/llm.py
new file mode 100644
index 00000000..fff9a2a2
--- /dev/null
+++ b/backend/apps/chat/schemas/llm.py
@@ -0,0 +1,33 @@
+from langchain_community.utilities import SQLDatabase
+# from langchain_community.agent_toolkits import create_sql_agent
+from langchain_community.llms import Tongyi
+from langchain_core.prompts import ChatPromptTemplate
+from apps.chat.schemas.chat_base_schema import LLMConfig, LLMFactory
+from common.core.config import settings
+import warnings
+
+warnings.filterwarnings("ignore")
+
+class LLMService:
+    def __init__(self, config: LLMConfig):
+        # Initialize database connection
+        self.db = SQLDatabase.from_uri(str(settings.SQLALCHEMY_DATABASE_URI))
+        
+        # Create LLM instance through factory
+        llm_instance = LLMFactory.create_llm(config)
+        self.llm = llm_instance.llm
+        
+        # Define prompt template
+        self.prompt = ChatPromptTemplate.from_messages([
+            ("system", """You are a professional SQL engineer. Generate PostgreSQL SELECT queries based on the database schema and user questions.
+            Data modification or deletion is prohibited. Table structure is as follows:
+            {schema}
+            """),
+            ("human", "{question}")
+        ])
+    
+    def generate_sql(self, question: str) -> str:
+        chain = self.prompt | self.llm
+        schema = self.db.get_table_info()
+        return chain.invoke({"schema": schema, "question": question})
+
diff --git a/backend/common/core/response_middleware.py b/backend/common/core/response_middleware.py
index 85c1cd85..f0979411 100644
--- a/backend/common/core/response_middleware.py
+++ b/backend/common/core/response_middleware.py
@@ -49,7 +49,14 @@ class ResponseMiddleware(BaseHTTPMiddleware):
                 )
             except Exception as e:
                 logging.error(f"Response processing error: {str(e)}", exc_info=True)
-                return response
+                return JSONResponse(
+                    status_code=500,
+                    content={
+                        "code": 500,
+                        "data": None,
+                        "msg": str(e)
+                    }
+                )
                 
         return response
 
diff --git a/backend/main.py b/backend/main.py
index f062e0f2..f8858542 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -3,13 +3,14 @@ from fastapi.responses import FileResponse
 from fastapi.staticfiles import StaticFiles
 import os
 import sentry_sdk
-from fastapi import FastAPI, Path
+from fastapi import FastAPI, Path, HTTPException
 from fastapi.routing import APIRoute
 from starlette.middleware.cors import CORSMiddleware
+from starlette.exceptions import HTTPException as StarletteHTTPException
 from apps.api import api_router
 from apps.system.middleware.auth import TokenMiddleware
 from common.core.config import settings
-from common.core.response_middleware import ResponseMiddleware
+from common.core.response_middleware import ResponseMiddleware, exception_handler
 
 def custom_generate_unique_id(route: APIRoute) -> str:
     tag = route.tags[0] if route.tags and len(route.tags) > 0 else ""
@@ -39,6 +40,9 @@ app.add_middleware(TokenMiddleware)
 app.add_middleware(ResponseMiddleware)
 app.include_router(api_router, prefix=settings.API_V1_STR)
 
+# Register exception handlers
+app.add_exception_handler(StarletteHTTPException, exception_handler.http_exception_handler)
+app.add_exception_handler(Exception, exception_handler.global_exception_handler)
 
 frontend_dist = os.path.abspath("../frontend/dist")
 if not os.path.exists(frontend_dist):
diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 41ccb44e..4ac10e32 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -19,6 +19,13 @@ dependencies = [
     "sentry-sdk[fastapi]<2.0.0,>=1.40.6",
     "pyjwt<3.0.0,>=2.8.0",
     "pycryptodome (>=3.22.0,<4.0.0)",
+    "langchain>=0.1.0,<0.2.0",
+    "langchain-core>=0.1.10,<0.2.0",
+    "langchain-openai>=0.1.0,<0.2.0",
+    "langchain-community>=0.0.19,<0.1.0",
+    "vllm>=0.8.5",
+    "dashscope>=1.14.0,<2.0.0",
+    "sse-starlette>=1.8.0,<2.0.0"
     "pymysql (>=1.1.1,<2.0.0)",
 ]
 [[tool.uv.index]]
diff --git a/frontend/src/api/chat.ts b/frontend/src/api/chat.ts
new file mode 100644
index 00000000..c96d9d64
--- /dev/null
+++ b/frontend/src/api/chat.ts
@@ -0,0 +1,10 @@
+import { request } from '@/utils/request'
+
+export const questionApi = {
+  pager: (pageNumber: number, pageSize: number) => request.get(`/chat/question/pager/${pageNumber}/${pageSize}`),
+  // add: (data: any, progress: any) => request.post('/chat/question', data, { responseType: 'stream', onDownloadProgress: progress }),
+  add: (data: any) => request.post('/chat/question', data),
+  edit: (data: any) => request.put('/chat/question', data),
+  delete: (id: number) => request.delete(`/chat/question/${id}`),
+  query: (id: number) => request.get(`/chat/question/${id}`)
+}
\ No newline at end of file
diff --git a/frontend/src/entity/CommonEntity.ts b/frontend/src/entity/CommonEntity.ts
new file mode 100644
index 00000000..d926132d
--- /dev/null
+++ b/frontend/src/entity/CommonEntity.ts
@@ -0,0 +1,22 @@
+
+export interface SelectOption {
+  label: string
+  value: string | number
+}
+
+export const modelTypeOptions: SelectOption[] = [
+  { label: 'OpenAI', value: 0 },
+  { label: 'Anthropic', value: 1 },
+  { label: 'Baidu', value: 2 },
+  { label: 'iFLYTEK', value: 3 },
+  { label: 'Zhipu AI', value: 4 },
+  { label: 'MiniMax', value: 5 },
+  { label: 'Tencent', value: 6 },
+  { label: 'Other', value: 7 },
+]
+
+export const getModelTypeName = (value: any) => {
+  const tv = parseInt(value)
+  const item = modelTypeOptions.find(item => item.value === tv)
+  return item?.label || ''
+}
\ No newline at end of file
diff --git a/frontend/src/utils/request.ts b/frontend/src/utils/request.ts
index 4e20c920..c314c492 100644
--- a/frontend/src/utils/request.ts
+++ b/frontend/src/utils/request.ts
@@ -49,7 +49,7 @@ class HttpService {
     this.cancelTokenSource = axios.CancelToken.source()
     this.instance = axios.create({
       baseURL: import.meta.env.VITE_API_BASE_URL,
-      timeout: 15000,
+      timeout: 50000,
       headers: {
         'Content-Type': 'application/json',
         ...config?.headers
@@ -155,6 +155,10 @@ class HttpService {
         default:
           errorMessage = `Server responded with error: ${error.response.status}`
       }
+      if (error?.response?.data) {
+        const msgData: any = error.response.data
+        msgData.msg && (errorMessage = msgData.msg)
+      }
     } else if (error.request) {
       errorMessage = 'No response from server'
     } else if (axios.isCancel(error)) {
diff --git a/frontend/src/views/chat/index.vue b/frontend/src/views/chat/index.vue
index db827254..b97139c9 100644
--- a/frontend/src/views/chat/index.vue
+++ b/frontend/src/views/chat/index.vue
@@ -50,7 +50,8 @@
             class="message"
             :class="msg.role"
           >
-            <div class="message-content">{{ msg.content }}</div>
+            <!-- <div class="message-content">{{ msg.content }}</div> -->
+            <div class="message-content" v-html="formatMessage(msg.content)"></div>
           </div>
         </template>
         <div v-else class="empty-state">
@@ -87,8 +88,10 @@
 </template>
 
 <script setup lang="ts">
-import { ref, computed, nextTick } from 'vue'
+import { ref, computed, nextTick, watch } from 'vue'
 import { Plus, Search, More, Position } from '@element-plus/icons-vue'
+import { questionApi } from '@/api/chat'
+
 
 interface ChatMessage {
   role: 'user' | 'assistant'
@@ -105,6 +108,7 @@ const chatHistory = ref<Chat[]>([])
 const currentChatId = ref('')
 const searchKeyword = ref('')
 const inputMessage = ref('')
+const messagesRef = ref<HTMLDivElement>()
 
 const filteredHistory = computed(() => {
   return chatHistory.value.filter(chat => 
@@ -130,19 +134,72 @@ const switchChat = (chatId: string) => {
   currentChatId.value = chatId
 }
 
+const scrollToBottom = () => {
+  nextTick(() => {
+    if (messagesRef.value) {
+      const scrollHeight = messagesRef.value.scrollHeight
+      const animateScroll = () => {
+        const currentScroll = messagesRef.value!.scrollTop
+        const distance = scrollHeight - currentScroll
+        if (distance > 0) {
+          window.requestAnimationFrame(animateScroll)
+          messagesRef.value!.scrollTop = currentScroll + distance / 8
+        }
+      }
+      animateScroll()
+    }
+  })
+}
+
 const sendMessage = () => {
   if (!inputMessage.value.trim()) return
   
-  const chat = currentChat.value
-  if (!chat) return
+  let chat = currentChat.value
+  // if (!chat) return
+  if (!chat) {
+    chat = {
+      id: null,
+      title: 'test',
+      messages: []
+    } as unknown as Chat
+  }
 
   chat.messages.push({
     role: 'user',
     content: inputMessage.value
   })
   
-  
+  const param = {
+    question: inputMessage.value
+  }
   inputMessage.value = ''
+  chatHistory.value.unshift(chat)
+  currentChatId.value = chat.id
+  
+  
+  // const index = chat.messages.length - 1
+  questionApi.add(param).then((result: string) => {
+    // chat.messages[index]['content'] += result
+    chat.messages.push({
+      role: 'assistant',
+      content: result
+    })
+    scrollToBottom()
+  })
+}
+
+watch(() => currentChat.value?.messages, () => {
+  scrollToBottom()
+}, { deep: true })
+
+const formatMessage = (content: string) => {
+  if (!content) return ''
+  return content
+    .replace(/&/g, '&amp;')
+    .replace(/</g, '&lt;')
+    .replace(/>/g, '&gt;')
+    .replace(/\n/g, '<br>')
+    .replace(/ {2}/g, '&nbsp;&nbsp;')
 }
 
 const handleCommand = (command: string, chatId: string) => {
@@ -253,6 +310,28 @@ const handleCtrlEnter = (e: KeyboardEvent) => {
       flex: 1;
       overflow-y: auto;
       padding: 24px;
+      
+      &::-webkit-scrollbar {
+        width: 6px;
+        height: 6px;
+      }
+      
+      &::-webkit-scrollbar-thumb {
+        background: #ccc;
+        border-radius: 3px;
+        
+        &:hover {
+          background: #999;
+        }
+      }
+      
+      &::-webkit-scrollbar-track {
+        background: transparent;
+      }
+      
+      &:not(:hover)::-webkit-scrollbar-thumb {
+        background: transparent;
+      }
 
       .message {
         margin-bottom: 24px;
@@ -266,6 +345,7 @@ const handleCtrlEnter = (e: KeyboardEvent) => {
 
         &.assistant .message-content {
           background-color: #f5f5f5;
+          text-align: left;
         }
 
         .message-content {
diff --git a/frontend/src/views/system/model/index.vue b/frontend/src/views/system/model/index.vue
index fd472fea..15979168 100644
--- a/frontend/src/views/system/model/index.vue
+++ b/frontend/src/views/system/model/index.vue
@@ -32,7 +32,11 @@
       <el-table :data="state.tableData" style="width: 100%" row-key="id" @selection-change="handleSelectionChange">
         <el-table-column type="selection" width="55" />
         <el-table-column prop="name" label="Model Name" width="280" />
-        <el-table-column prop="type" label="Model Type"  width="280" />
+        <el-table-column prop="type" label="Model Type"  width="280">
+          <template #default="scope">
+            <span>{{ getModelTypeName(scope.row.type) }}</span>
+          </template>
+        </el-table-column>
         <el-table-column prop="api_key" label="API KEY" width="280">
           <template #default="scope">
             <div class="user-status-container" :class="[ scope.row.api_key ? 'active' : 'disabled' ]">
@@ -100,9 +104,10 @@
       
       <el-form-item label="Model Type">
         <el-select v-model="state.form.type" placeholder="Please select a type">
-          <el-option label="domain1" value="0" />
+          <el-option v-for="item in modelTypeOptions" :key="item.value" :label="item.label" :value="item.value" />
+          <!-- <el-option label="domain1" value="0" />
           <el-option label="domain2" value="1" />
-          <el-option label="domain3" value="2" />
+          <el-option label="domain3" value="2" /> -->
         </el-select>
       </el-form-item>
 
@@ -152,7 +157,7 @@ import IconOpeEdit from '@/assets/svg/operate/ope-edit.svg';
 import IconOpeDelete from '@/assets/svg/operate/ope-delete.svg';
 import { modelApi } from '@/api/system'
 import { formatTimestamp } from '@/utils/date'
-
+import { modelTypeOptions, getModelTypeName } from '@/entity/CommonEntity.ts'
 const keyword = ref('')
 const dialogFormVisible = ref(false)
 const termFormRef = ref()