我做过一个聊天室的例子，下面是代码片段，提供一个思路 io.sockets.on(‘connection’, function (socket) { socket.on(‘sign in’, function (data) { var roomId = data.roomId; //保存房间 socket.set(‘room’,roomId,function(){ console.log(“房间号:”+room_id+“已保存”); }); socket.join(roomId); socket.broadcast.to(roomId).emit(‘system message’, ‘欢迎XX光临~’); }); socket.on(‘message’,function(){ socket.get(‘room’, function(err, room){ io.sockets.in(room).emit(‘message’, ‘some msg’); }) }) })