diff --git a/wshandler/wshandler.go b/wshandler/wshandler.go
index ae73ddf..e8597e3 100644
--- a/wshandler/wshandler.go
+++ b/wshandler/wshandler.go
@@ -50,6 +50,20 @@ type CommandMessage struct {
 	Args []string
 }
 
+type WebSocketMessageType int
+
+const (
+	TextMessage   = WebSocketMessageType(websocket.TextMessage)
+	BinaryMessage = WebSocketMessageType(websocket.BinaryMessage)
+	CloseMessage  = WebSocketMessageType(websocket.CloseMessage)
+	PingMessage   = WebSocketMessageType(websocket.PingMessage)
+	PongMessage   = WebSocketMessageType(websocket.PongMessage)
+	Connected     = WebSocketMessageType(100)
+	Disconnected  = WebSocketMessageType(101)
+)
+
+type WebSocketMessageReceiver func(accid primitive.ObjectID, alias string, messageType WebSocketMessageType, body io.Reader)
+
 type subhandler struct {
 	name             string
 	authCache        *gocommon.AuthCollection
@@ -58,8 +72,7 @@ type subhandler struct {
 	redisSync        *redis.Client
 	connInOutChan    chan *wsconn
 	deliveryChan     chan any
-
-	callReceiver func(primitive.ObjectID, string, io.Reader)
+	callReceiver     WebSocketMessageReceiver
 }
 
 // WebsocketHandler  :
@@ -72,7 +85,7 @@ type wsConfig struct {
 	SyncPipeline string `json:"ws_sync_pipeline"`
 }
 
-func NewWebsocketHandler[T any](authglobal gocommon.AuthCollectionGlobal, receiver func(primitive.ObjectID, string, *T)) (wsh *WebsocketHandler) {
+func NewWebsocketHandler(authglobal gocommon.AuthCollectionGlobal, receiver WebSocketMessageReceiver) (wsh *WebsocketHandler) {
 	var config wsConfig
 	gocommon.LoadConfig(&config)
 
@@ -81,20 +94,20 @@ func NewWebsocketHandler[T any](authglobal gocommon.AuthCollectionGlobal, receiv
 		panic(err)
 	}
 
-	decoder := func(r io.Reader) *T {
-		if r == nil {
-			// 접속이 끊겼을 때.
-			return nil
-		}
-		var m T
-		dec := json.NewDecoder(r)
-		if err := dec.Decode(&m); err != nil {
-			logger.Println(err)
-		}
+	// decoder := func(r io.Reader) *T {
+	// 	if r == nil {
+	// 		// 접속이 끊겼을 때.
+	// 		return nil
+	// 	}
+	// 	var m T
+	// 	dec := json.NewDecoder(r)
+	// 	if err := dec.Decode(&m); err != nil {
+	// 		logger.Println(err)
+	// 	}
 
-		// decoding 실패하더라도 빈 *T를 내보냄
-		return &m
-	}
+	// 	// decoding 실패하더라도 빈 *T를 내보냄
+	// 	return &m
+	// }
 
 	authCaches := make(map[string]*subhandler)
 	for _, region := range authglobal.Regions() {
@@ -106,9 +119,7 @@ func NewWebsocketHandler[T any](authglobal gocommon.AuthCollectionGlobal, receiv
 			redisSync:        redisSync,
 			connInOutChan:    make(chan *wsconn),
 			deliveryChan:     make(chan any, 1000),
-			callReceiver: func(accid primitive.ObjectID, alias string, r io.Reader) {
-				receiver(accid, alias, decoder(r))
-			},
+			callReceiver:     receiver,
 		}
 
 		authCaches[region] = sh
@@ -254,7 +265,7 @@ func (sh *subhandler) mainLoop(ctx context.Context) {
 				for _, room := range rooms {
 					room.out(c)
 				}
-				sh.callReceiver(c.accid, c.alias, nil)
+				sh.callReceiver(c.accid, c.alias, Connected, nil)
 			} else {
 				entireConns[c.alias] = c
 			}
@@ -285,7 +296,9 @@ func upgrade_core(sh *subhandler, conn *websocket.Conn, accid primitive.ObjectID
 
 			if messageType == websocket.TextMessage {
 				// 유저가 직접 보낸 메시지
-				sh.callReceiver(accid, c.alias, r)
+				sh.callReceiver(accid, c.alias, TextMessage, r)
+			} else if messageType == websocket.BinaryMessage {
+				sh.callReceiver(accid, c.alias, BinaryMessage, r)
 			}
 		}
 		sh.redisSync.HDel(context.Background(), sh.name, accid.Hex())