diff --git a/.gitignore b/.gitignore
index 7efc8a8..02c17fd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -36,9 +36,6 @@ src-tauri/target/
 .env.local
 .env.*.local
 
-# Config
-config.json
-
 # OS
 .DS_Store
 Thumbs.db
diff --git a/server/index.js b/server/index.js
index b22668a..98c1a1f 100644
--- a/server/index.js
+++ b/server/index.js
@@ -75,6 +75,26 @@ io.on('connection', (socket) => {
     socket.emit('room-users', roomUsers);
   });
 
+  socket.on('leave-room', ({ roomId, userId, socketId }) => {
+    const user = users.get(socketId);
+    if (user && user.roomId === roomId) {
+      const room = rooms.get(roomId);
+      if (room) {
+        room.delete(socketId);
+        socket.to(roomId).emit('user-left', {
+          userId: user.userId,
+          socketId: socketId
+        });
+
+        if (room.size === 0) {
+          rooms.delete(roomId);
+        }
+      }
+      users.delete(socketId);
+      socket.leave(roomId);
+    }
+  });
+
   socket.on('signal', ({ targetSocketId, signal }) => {
     const targetUser = users.get(targetSocketId);
     if (targetUser) {
diff --git a/src/App.vue b/src/App.vue
index 85e1206..b866a70 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -1,5 +1,5 @@
 <script setup>
-import { ref, onMounted, onUnmounted } from 'vue';
+import { ref, computed, onMounted, onUnmounted } from 'vue';
 import { io } from 'socket.io-client';
 
 // 导入组件
@@ -16,7 +16,7 @@ import { useWebRTC } from './composables/useWebRTC.js';
 import { useFileTransfer } from './composables/useFileTransfer.js';
 
 // 使用组合式函数
-const { socket, userId, nickname, connected, roomUsers, roomId, joinRoom, serverUrl, connectToServer, disconnectFromServer } = useSocket();
+const { socket, userId, nickname, connected, roomUsers, roomId, joinRoom, leaveRoom, onUserLeft, serverUrl, connectToServer, disconnectFromServer } = useSocket();
 const localServerUrl = ref(serverUrl.value);
 
 // 处理连接按钮点击
@@ -35,7 +35,8 @@ const {
   createPeerConnection, 
   handleSignal, 
   setupDataChannel, 
-  closePeerConnection 
+  closePeerConnection,
+  closeAllPeerConnections
 } = useWebRTC();
 const { 
   transfers, 
@@ -45,7 +46,8 @@ const {
   sendFile, 
   acceptFile, 
   rejectFile, 
-  selectFile 
+  selectFile,
+  clearTransfers
 } = useFileTransfer();
 
 // 连接用户
@@ -100,8 +102,29 @@ function handleDisconnectUser(socketId) {
   closePeerConnection(socketId);
 }
 
-// 监听信号
+// 判断是否有文件正在传输
+const hasActiveTransfer = computed(() => {
+  return transfers.value.some(t => 
+    t.status === 'sending' || t.status === 'receiving'
+  );
+});
+
+// 处理退出房间事件
+function handleLeaveRoom() {
+  if (hasActiveTransfer.value) {
+    return;
+  }
+  closeAllPeerConnections();
+  clearTransfers();
+  leaveRoom();
+}
+
+// 设置用户离开回调和监听信号
 onMounted(() => {
+  onUserLeft.value = (socketId) => {
+    closePeerConnection(socketId);
+  };
+
   if (socket.value) {
     socket.value.on('signal', async ({ senderSocketId, signal }) => {
       await handleSignal(
@@ -182,8 +205,10 @@ onUnmounted(() => {
       :peer-connections="peerConnections"
       :room-id="roomId"
       :current-socket-id="socket?.id"
+      :has-active-transfer="hasActiveTransfer"
       @connect-user="connectToUser"
       @disconnect-user="handleDisconnectUser"
+      @leave-room="handleLeaveRoom"
     />
 
     <FileSend 
diff --git a/src/components/UserList.vue b/src/components/UserList.vue
index 7576ec0..300ae0a 100644
--- a/src/components/UserList.vue
+++ b/src/components/UserList.vue
@@ -1,6 +1,16 @@
 <template>
   <div class="section" v-if="roomId">
-    <h2>{{ $t('room.users_in_room') }}</h2>
+    <div class="room-header">
+      <h2>{{ $t('room.users_in_room') }}</h2>
+      <button 
+        @click="leaveRoom" 
+        :disabled="hasActiveTransfer"
+        class="leave-room-btn"
+        :title="hasActiveTransfer ? $t('room.cannot_leave_room') : ''"
+      >
+        {{ $t('room.leave_room') }}
+      </button>
+    </div>
     <div class="room-info">
       <span class="room-id">{{ $t('room.room_id') }}: {{ roomId }}</span>
       <span class="user-count">{{ $t('room.users_in_room') }}: {{ roomUsers.length }}</span>
@@ -57,11 +67,15 @@ const props = defineProps({
   currentSocketId: {
     type: String,
     default: ''
+  },
+  hasActiveTransfer: {
+    type: Boolean,
+    default: false
   }
 });
 
 // 定义组件emit事件
-const emit = defineEmits(['connectUser', 'disconnectUser']);
+const emit = defineEmits(['connectUser', 'disconnectUser', 'leaveRoom']);
 
 // 判断是否为当前用户
 function isCurrentUser(socketId) {
@@ -77,6 +91,11 @@ function connectToUser(socketId) {
 function disconnectFromUser(socketId) {
   emit('disconnectUser', socketId);
 }
+
+// 处理退出房间事件
+function leaveRoom() {
+  emit('leaveRoom');
+}
 </script>
 
 <style scoped>
@@ -88,6 +107,42 @@ function disconnectFromUser(socketId) {
   box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
 }
 
+.room-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  margin-bottom: 15px;
+}
+
+.room-header h2 {
+  margin: 0;
+}
+
+.leave-room-btn {
+  padding: 8px 16px;
+  background: #ff9800;
+  color: white;
+  border: none;
+  border-radius: 4px;
+  cursor: pointer;
+  transition: all 0.2s ease;
+  font-size: 0.9em;
+}
+
+.leave-room-btn:disabled {
+  background: #ccc;
+  cursor: not-allowed;
+}
+
+.leave-room-btn:hover:not(:disabled) {
+  transform: translateY(-1px);
+  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
+}
+
+.leave-room-btn:active:not(:disabled) {
+  transform: translateY(0);
+}
+
 .room-info {
   display: flex;
   gap: 15px;
diff --git a/src/composables/useFileTransfer.js b/src/composables/useFileTransfer.js
index a6c93c0..b1e321c 100644
--- a/src/composables/useFileTransfer.js
+++ b/src/composables/useFileTransfer.js
@@ -319,6 +319,11 @@ export function useFileTransfer() {
     }
   }
 
+  function clearTransfers() {
+    transfers.value = [];
+    pendingTransfers.value = [];
+  }
+
   return {
     transfers,
     pendingTransfers,
@@ -327,6 +332,7 @@ export function useFileTransfer() {
     sendFile,
     acceptFile,
     rejectFile,
-    selectFile
+    selectFile,
+    clearTransfers
   };
 }
diff --git a/src/composables/useSocket.js b/src/composables/useSocket.js
index d1b0388..c96d71d 100644
--- a/src/composables/useSocket.js
+++ b/src/composables/useSocket.js
@@ -1,16 +1,12 @@
 import { ref, onMounted, onUnmounted } from 'vue';
 import { io } from 'socket.io-client';
 import { generateUserId } from '../utils';
-import config from '../../config.json';
+
 
 function isTauri() {
   return window.__TAURI__ !== undefined;
 }
 
-function getDefaultServerUrl() {
-  return config.defaultServerUrl || 'http://localhost:3000';
-}
-
 export function useSocket() {
   const socket = ref(null);
   const userId = ref('');
@@ -18,7 +14,8 @@ export function useSocket() {
   const connected = ref(false);
   const roomUsers = ref([]);
   const roomId = ref('');
-  const serverUrl = ref(localStorage.getItem('p2p-server-url') || getDefaultServerUrl());
+  const serverUrl = ref(localStorage.getItem('p2p-server-url') || 'wss://p2p-file-transfer.cloyir.com');
+  const onUserLeft = ref(null);
 
   onMounted(() => {
     userId.value = generateUserId();
@@ -36,10 +33,10 @@ export function useSocket() {
     if (socket.value) {
       socket.value.disconnect();
     }
-    
+
     serverUrl.value = url;
     localStorage.setItem('p2p-server-url', url);
-    
+
     const socketOptions = {
       transports: ['websocket', 'polling'],
       reconnection: true,
@@ -58,7 +55,7 @@ export function useSocket() {
     } else {
       socketOptions.withCredentials = false;
     }
-    
+
     socket.value = io(url, socketOptions);
 
     socket.value.on('connect', () => {
@@ -83,6 +80,9 @@ export function useSocket() {
 
     socket.value.on('user-left', ({ userId: leftUserId, socketId }) => {
       roomUsers.value = roomUsers.value.filter(u => u.socketId !== socketId);
+      if (onUserLeft.value) {
+        onUserLeft.value(socketId);
+      }
     });
   }
 
@@ -99,14 +99,26 @@ export function useSocket() {
         nickname.value = newNickname;
         localStorage.setItem('p2p-nickname', newNickname);
       }
-      socket.value.emit('join-room', { 
-        roomId: roomId.value, 
+      socket.value.emit('join-room', {
+        roomId: roomId.value,
         userId: userId.value,
-        nickname: nickname.value 
+        nickname: nickname.value
       });
     }
   }
 
+  function leaveRoom() {
+    if (roomId.value && socket.value) {
+      socket.value.emit('leave-room', {
+        roomId: roomId.value,
+        userId: userId.value,
+        socketId: socket.value.id
+      });
+      roomId.value = '';
+      roomUsers.value = [];
+    }
+  }
+
   return {
     socket,
     userId,
@@ -115,8 +127,10 @@ export function useSocket() {
     roomUsers,
     roomId,
     serverUrl,
-    joinRoom,
+    onUserLeft,
     connectToServer,
-    disconnectFromServer
+    disconnectFromServer,
+    joinRoom,
+    leaveRoom
   };
 }
diff --git a/src/composables/useWebRTC.js b/src/composables/useWebRTC.js
index 91593e9..3c73954 100644
--- a/src/composables/useWebRTC.js
+++ b/src/composables/useWebRTC.js
@@ -137,6 +137,8 @@ export function useWebRTC() {
     channel.onclose = () => {
       console.log('Data channel closed with:', socketId);
       dataChannelReady.value.delete(socketId);
+      dataChannels.value.delete(socketId);
+      peerConnections.value.delete(socketId);
     };
   }
 
@@ -153,6 +155,20 @@ export function useWebRTC() {
     }
   }
 
+  function closeAllPeerConnections() {
+    peerConnections.value.forEach((pc, socketId) => {
+      pc.close();
+    });
+    peerConnections.value.clear();
+
+    dataChannels.value.forEach((dc) => {
+      dc.close();
+    });
+    dataChannels.value.clear();
+
+    dataChannelReady.value.clear();
+  }
+
   return {
     peerConnections,
     dataChannels,
@@ -160,6 +176,7 @@ export function useWebRTC() {
     createPeerConnection,
     handleSignal,
     setupDataChannel,
-    closePeerConnection
+    closePeerConnection,
+    closeAllPeerConnections
   };
 }
diff --git a/src/i18n/locales/en-US.js b/src/i18n/locales/en-US.js
index 11735d8..06cba48 100644
--- a/src/i18n/locales/en-US.js
+++ b/src/i18n/locales/en-US.js
@@ -17,7 +17,9 @@ export default {
     nickname: 'Nickname',
     join: 'Join',
     leave: 'Leave',
-    users_in_room: 'Users in Room'
+    users_in_room: 'Users in Room',
+    leave_room: 'Leave Room',
+    cannot_leave_room: 'Cannot leave room while transferring files'
   },
   file_transfer: {
     connect: 'Connect',
diff --git a/src/i18n/locales/zh-CN.js b/src/i18n/locales/zh-CN.js
index 1a57a3b..66db459 100644
--- a/src/i18n/locales/zh-CN.js
+++ b/src/i18n/locales/zh-CN.js
@@ -17,7 +17,9 @@ export default {
     nickname: '昵称',
     join: '加入',
     leave: '离开',
-    users_in_room: '房间内用户'
+    users_in_room: '房间内用户',
+    leave_room: '退出房间',
+    cannot_leave_room: '正在传输文件，无法退出房间'
   },
   file_transfer: {
     connect: '连接',