diff --git a/conn/conn_mgr.go b/conn/conn_mgr.go
index 8629a56..368bcfb 100644
--- a/conn/conn_mgr.go
+++ b/conn/conn_mgr.go
@@ -35,7 +35,22 @@ func (m *Manager) Store(groupName string, s entity.NetworkEntity) error {
 	return group.Add(s)
 }
 
-func (m *Manager) Remove(groupName string, s entity.NetworkEntity) error {
+func (m *Manager) Remove(s entity.NetworkEntity) error {
+	m.Lock()
+	defer m.Unlock()
+	delete(m.conns, s.Session().ID())
+
+	// 从所有group中移除
+	for _, group := range m.groups {
+		err := group.Leave(s)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (m *Manager) RemoveFromGroup(groupName string, s entity.NetworkEntity) error {
 	m.Lock()
 	delete(m.conns, s.Session().ID())
 	m.Unlock()
diff --git a/conn/group.go b/conn/group.go
index b9d5b59..2df6a89 100644
--- a/conn/group.go
+++ b/conn/group.go
@@ -203,15 +203,15 @@ func (c *Group) LeaveAll() error {
 }
 
 // 使用移位法移除group中与name匹配的元素
-func (c *Group) removeGroupAttr(group []string) []string {
+func (c *Group) removeGroupAttr(groups []string) []string {
 	j := 0
-	for _, v := range group {
+	for _, v := range groups {
 		if v != c.name {
-			group[j] = v
+			groups[j] = v
 			j++
 		}
 	}
-	return group[:j]
+	return groups[:j]
 }
 
 // Count get current member amount in the group
diff --git a/core/connection.go b/core/connection.go
index d8e7b90..5df9fc4 100644
--- a/core/connection.go
+++ b/core/connection.go
@@ -3,7 +3,6 @@ package core
 import (
 	"errors"
 	"fmt"
-	"git.noahlan.cn/noahlan/nnet/conn"
 	"git.noahlan.cn/noahlan/nnet/entity"
 	"git.noahlan.cn/noahlan/nnet/packet"
 	"git.noahlan.cn/noahlan/nnet/scheduler"
@@ -267,9 +266,9 @@ func (r *connection) Close() error {
 	case <-r.chDie:
 	default:
 		close(r.chDie)
-		scheduler.PushTask(func() { Lifetime.Close(r) })
+		scheduler.PushTask(func() { r.ngin.lifetime.Close(r) })
 	}
-	_ = r.ngin.connManager.Remove(conn.DefaultGroupName, r)
+	_ = r.ngin.connManager.Remove(r)
 	r.session.Close()
 
 	return r.conn.Close()
diff --git a/core/engine.go b/core/engine.go
index aadf1c0..99f3c45 100644
--- a/core/engine.go
+++ b/core/engine.go
@@ -6,6 +6,7 @@ import (
 	"git.noahlan.cn/noahlan/nnet/config"
 	conn2 "git.noahlan.cn/noahlan/nnet/conn"
 	"git.noahlan.cn/noahlan/nnet/entity"
+	"git.noahlan.cn/noahlan/nnet/lifetime"
 	"git.noahlan.cn/noahlan/nnet/packet"
 	"git.noahlan.cn/noahlan/nnet/pipeline"
 	"git.noahlan.cn/noahlan/nnet/scheduler"
@@ -43,6 +44,7 @@ type (
 		dieChan chan struct{}
 
 		pipeline pipeline.Pipeline // 消息管道
+		lifetime *lifetime.Mgr     // 连接的生命周期管理器
 
 		packerFn   packet.NewPackerFunc // 封包、拆包器
 		serializer serialize.Serializer // 消息 序列化/反序列化
@@ -72,6 +74,7 @@ func newEngine(conf config.EngineConf) *engine {
 		taskTimerPrecision: conf.TaskTimerPrecision,
 		connManager:        conn2.NewManager(),
 		sessIdMgr:          newSessionIDMgr(),
+		lifetime:           lifetime.NewLifetime(),
 	}
 	pool.InitPool(conf.Pool)
 
@@ -134,7 +137,7 @@ func (ng *engine) dial(addr string, router Router) (entity.NetworkEntity, error)
 	c := newConnection(ng, conn)
 	c.serve()
 	// hook
-	Lifetime.Open(c)
+	ng.lifetime.Open(c)
 	// connection manager
 	err = ng.connManager.Store(conn2.DefaultGroupName, c)
 	nlog.Must(err)
@@ -268,7 +271,7 @@ func (ng *engine) handle(conn net.Conn) {
 
 	c.serve()
 	// hook
-	Lifetime.Open(c)
+	ng.lifetime.Open(c)
 }
 
 func (ng *engine) notFoundHandler(next Handler) Handler {
diff --git a/core/lifetime.go b/core/lifetime.go
deleted file mode 100644
index 97c2ebe..0000000
--- a/core/lifetime.go
+++ /dev/null
@@ -1,42 +0,0 @@
-package core
-
-import "git.noahlan.cn/noahlan/nnet/entity"
-
-type (
-	LifetimeHandler func(entity entity.NetworkEntity)
-
-	lifetime struct {
-		onOpen   []LifetimeHandler
-		onClosed []LifetimeHandler
-	}
-)
-
-var Lifetime = &lifetime{}
-
-func (lt *lifetime) OnClosed(h LifetimeHandler) {
-	lt.onClosed = append(lt.onClosed, h)
-}
-
-func (lt *lifetime) OnOpen(h LifetimeHandler) {
-	lt.onOpen = append(lt.onOpen, h)
-}
-
-func (lt *lifetime) Open(entity entity.NetworkEntity) {
-	if len(lt.onOpen) <= 0 {
-		return
-	}
-
-	for _, handler := range lt.onOpen {
-		handler(entity)
-	}
-}
-
-func (lt *lifetime) Close(entity entity.NetworkEntity) {
-	if len(lt.onClosed) <= 0 {
-		return
-	}
-
-	for _, handler := range lt.onClosed {
-		handler(entity)
-	}
-}
diff --git a/core/nnet.go b/core/nnet.go
index c8c1ee6..deb34ba 100644
--- a/core/nnet.go
+++ b/core/nnet.go
@@ -4,6 +4,7 @@ import (
 	"git.noahlan.cn/noahlan/nnet/config"
 	"git.noahlan.cn/noahlan/nnet/conn"
 	"git.noahlan.cn/noahlan/nnet/entity"
+	"git.noahlan.cn/noahlan/nnet/lifetime"
 	"git.noahlan.cn/noahlan/nnet/packet"
 	"git.noahlan.cn/noahlan/nnet/pipeline"
 	"git.noahlan.cn/noahlan/nnet/serialize"
@@ -110,6 +111,11 @@ func (s *NNet) Pipeline() pipeline.Pipeline {
 	return s.ngin.pipeline
 }
 
+// Lifetime returns lifetime interface.
+func (s *NNet) Lifetime() lifetime.Lifetime {
+	return s.ngin.lifetime
+}
+
 // ConnManager returns connection manager
 func (s *NNet) ConnManager() *conn.Manager {
 	return s.ngin.connManager
diff --git a/lifetime/lifetime.go b/lifetime/lifetime.go
new file mode 100644
index 0000000..aef5ddb
--- /dev/null
+++ b/lifetime/lifetime.go
@@ -0,0 +1,52 @@
+package lifetime
+
+import "git.noahlan.cn/noahlan/nnet/entity"
+
+type (
+	Handler func(entity entity.NetworkEntity)
+
+	Lifetime interface {
+		OnClosed(h Handler)
+		OnOpen(h Handler)
+	}
+
+	Mgr struct {
+		onOpen   []Handler
+		onClosed []Handler
+	}
+)
+
+func NewLifetime() *Mgr {
+	return &Mgr{
+		onOpen:   make([]Handler, 0),
+		onClosed: make([]Handler, 0),
+	}
+}
+
+func (lt *Mgr) OnClosed(h Handler) {
+	lt.onClosed = append(lt.onClosed, h)
+}
+
+func (lt *Mgr) OnOpen(h Handler) {
+	lt.onOpen = append(lt.onOpen, h)
+}
+
+func (lt *Mgr) Open(entity entity.NetworkEntity) {
+	if len(lt.onOpen) <= 0 {
+		return
+	}
+
+	for _, handler := range lt.onOpen {
+		handler(entity)
+	}
+}
+
+func (lt *Mgr) Close(entity entity.NetworkEntity) {
+	if len(lt.onClosed) <= 0 {
+		return
+	}
+
+	for _, handler := range lt.onClosed {
+		handler(entity)
+	}
+}
diff --git a/middleware/heartbeat.go b/middleware/heartbeat.go
index 5c2e4e7..d06e98b 100644
--- a/middleware/heartbeat.go
+++ b/middleware/heartbeat.go
@@ -25,9 +25,10 @@ func WithHeartbeat(interval time.Duration, hbdFn func(entity entity.NetworkEntit
 		nlog.Error("dataFn must not be nil")
 		panic("dataFn must not be nil")
 	}
-	core.Lifetime.OnOpen(m.start)
 
 	return func(server *core.NNet) {
+		server.Lifetime().OnOpen(m.start)
+
 		server.Use(func(next core.HandlerFunc) core.HandlerFunc {
 			return func(entity entity.NetworkEntity, pkg packet.IPacket) {
 				m.handle(entity, pkg)