diff --git a/goemitter_test/main.go b/example/main.go
similarity index 63%
rename from goemitter_test/main.go
rename to example/main.go
index 98bd6c2..f7b94c7 100644
--- a/goemitter_test/main.go
+++ b/example/main.go
@@ -18,12 +18,22 @@ func (s *St) Print(data ...interface{}) {
 	fmt.Println(data...)
 }
 
+type A struct {
+	Name string
+}
+
+func (a *A) Exec(data ...interface{}) {
+	fmt.Println(a.Name, data)
+}
+
 func main() {
 
 	s := &St{Name: "testeer"}
 	em := emitter.NewEmitter()
-	em.On("test", func(data ...interface{}) {
+	emh := em.On("test", func(data ...interface{}) {
+		fmt.Println("should be canceled next")
 		fmt.Println(data...)
+
 	})
 
 	em.On("test", s.Print)
@@ -31,8 +41,19 @@ func main() {
 		s := fmt.Sprint(data...)
 		fmt.Println(interface{}("Once"), s)
 	})
+	func() {
+		em.On("test", func(data ...interface{}) {
+			fmt.Println("函数内匿名函数被调用")
+		})
+	}()
+	func() {
+		a := &A{Name: "ATEST"}
+		em.On("test", a.Exec)
+	}()
 	em.EmitSync("test", "hello", "world")
+	emh.Remove()
 	em.Emit("test", "hello", "world2")
+
 	defer func() {
 		if r := recover(); r != nil {
 			log.Println("Recovered in main:", r)
@@ -40,5 +61,5 @@ func main() {
 			log.Println(string(debug.Stack()))
 		}
 	}()
-	time.Sleep(1 * time.Second)
+	time.Sleep(10 * time.Second)
 }
diff --git a/goemitter_test/main b/goemitter_test/main
deleted file mode 100755
index fbf4a6b..0000000
Binary files a/goemitter_test/main and /dev/null differ
diff --git a/main.go b/main.go
index 21455c0..86ca5f5 100644
--- a/main.go
+++ b/main.go
@@ -6,19 +6,38 @@ import (
 )
 
 type EventEmitter struct {
-	callbacks     map[string][]func(args ...interface{})
+	callbacks     map[string]map[int]func(args ...interface{})
 	onceCallbacks map[string][]func(args ...interface{})
 	lock          sync.Mutex
+	counter       int
 }
 
-func (e *EventEmitter) On(event string, callback func(args ...interface{})) {
+type EventHandle struct {
+	id      int
+	event   string
+	emitter *EventEmitter
+}
+
+func (eh *EventHandle) Remove() {
+	eh.emitter.lock.Lock()
+	defer eh.emitter.lock.Unlock()
+	if _, ok := eh.emitter.callbacks[eh.event]; ok {
+		delete(eh.emitter.callbacks[eh.event], eh.id)
+	}
+}
+
+func (e *EventEmitter) On(event string, callback func(args ...interface{})) *EventHandle {
 	e.lock.Lock()
 	defer e.lock.Unlock()
-
+	e.counter++
 	if _, ok := e.callbacks[event]; !ok {
-		e.callbacks[event] = []func(args ...interface{}){callback}
-	} else {
-		e.callbacks[event] = append(e.callbacks[event], callback)
+		e.callbacks[event] = make(map[int]func(args ...interface{}))
+	}
+	e.callbacks[event][e.counter] = callback
+	return &EventHandle{
+		id:      e.counter,
+		event:   event,
+		emitter: e,
 	}
 }
 
@@ -73,7 +92,7 @@ func (e *EventEmitter) EmitSync(event string, data ...interface{}) {
 
 func NewEmitter() *EventEmitter {
 	ret := &EventEmitter{}
-	ret.callbacks = make(map[string][]func(args ...interface{}))
+	ret.callbacks = make(map[string]map[int]func(args ...interface{}))
 	ret.onceCallbacks = make(map[string][]func(args ...interface{}))
 	return ret
 }
diff --git a/main_test.go b/main_test.go
index bf45291..18f9462 100644
--- a/main_test.go
+++ b/main_test.go
@@ -6,18 +6,15 @@ import (
 )
 
 func TestEventEmitter_Emit(t *testing.T) {
-	emitter := &EventEmitter{
-		callbacks:     make(map[string][]func(args ...interface{})),
-		onceCallbacks: make(map[string][]func(args ...interface{})),
-	}
+	emitter := NewEmitter()
 
 	// 注册一个普通回调函数
-	emitter.callbacks["testEvent"] = append(emitter.callbacks["testEvent"], func(data ...interface{}) {
+	emitter.On("testEvent", func(data ...interface{}) {
 		t.Log("普通回调函数被调用")
 	})
 
 	// 注册一个一次性回调函数
-	emitter.onceCallbacks["testEvent"] = append(emitter.onceCallbacks["testEvent"], func(data ...interface{}) {
+	emitter.Once("testEvent", func(data ...interface{}) {
 		t.Log("一次性回调函数被调用")
 	})
 
@@ -32,9 +29,7 @@ func TestEventEmitter_Emit(t *testing.T) {
 }
 
 func TestEventEmitter_Once(t *testing.T) {
-	emitter := &EventEmitter{
-		onceCallbacks: make(map[string][]func(args ...interface{})),
-	}
+	emitter := NewEmitter()
 
 	// 测试添加新事件和回调函数
 	emitter.Once("event1", func(args ...interface{}) {})
@@ -58,3 +53,16 @@ func TestEventEmitter_Once(t *testing.T) {
 		t.Error("一次性回调函数没有被清除")
 	}
 }
+
+func TestEmitterWithScope(t *testing.T) {
+	emitter := NewEmitter()
+	emitter.On("testEvent", func(data ...interface{}) {
+		t.Log("普通回调函数被调用")
+	})
+	func() {
+		emitter.On("testEvent", func(data ...interface{}) {
+			t.Log("匿名函数被调用")
+		})
+	}()
+	emitter.Emit("testEvent", "testData")
+}