diff --git a/game/builtin/room_seat.go b/game/builtin/room_seat.go
new file mode 100644
index 0000000..693c99e
--- /dev/null
+++ b/game/builtin/room_seat.go
@@ -0,0 +1,89 @@
+package builtin
+
+import (
+	"github.com/kercylan98/minotaur/game"
+	"github.com/kercylan98/minotaur/utils/synchronization"
+	"sync"
+)
+
+func NewRoomSeat[PlayerID comparable, Player game.Player[PlayerID]](room game.Room[PlayerID, Player]) *RoomSeat[PlayerID, Player] {
+	roomSeat := &RoomSeat[PlayerID, Player]{
+		Room:   room,
+		seatPS: synchronization.NewMap[PlayerID, int](),
+	}
+	room.RegPlayerJoinRoomEvent(roomSeat.onJoinRoom)
+	room.RegPlayerLeaveRoomEvent(roomSeat.onLeaveRoom)
+	return roomSeat
+}
+
+type RoomSeat[PlayerID comparable, Player game.Player[PlayerID]] struct {
+	game.Room[PlayerID, Player]
+	mutex   sync.Mutex
+	vacancy []int
+	seatPS  *synchronization.Map[PlayerID, int]
+	seatSP  []*PlayerID
+}
+
+func (slf *RoomSeat[PlayerID, Player]) SetSeat(id PlayerID, seat int) error {
+	oldSeat, err := slf.GetSeat(id)
+	if err != nil {
+		return err
+	}
+	player, err := slf.GetPlayerWithSeat(seat)
+	if err != nil {
+		ov := slf.seatSP[oldSeat]
+		slf.seatSP[oldSeat] = slf.seatSP[seat]
+		slf.seatSP[seat] = ov
+		slf.seatPS.Set(id, seat)
+		slf.seatPS.Set(player.GetID(), oldSeat)
+	} else {
+		maxSeat := len(slf.seatSP) - 1
+		if seat > maxSeat {
+			count := seat - maxSeat
+			slf.seatSP = append(slf.seatSP, make([]*PlayerID, count)...)
+		}
+		slf.seatSP[seat] = slf.seatSP[oldSeat]
+		slf.seatSP[oldSeat] = nil
+		slf.seatPS.Set(id, seat)
+	}
+	return nil
+}
+
+func (slf *RoomSeat[PlayerID, Player]) GetSeat(id PlayerID) (int, error) {
+	seat, exist := slf.seatPS.GetExist(id)
+	if !exist {
+		return 0, ErrRoomNotHasPlayer
+	}
+	return seat, nil
+}
+
+func (slf *RoomSeat[PlayerID, Player]) GetPlayerWithSeat(seat int) (player Player, err error) {
+	if seat > len(slf.seatSP)-1 {
+		return player, ErrRoomNotHasPlayer
+	}
+	id := slf.seatSP[seat]
+	if id == nil {
+		return player, ErrRoomNotHasPlayer
+	}
+	return slf.GetPlayer(*id), nil
+}
+
+func (slf *RoomSeat[PlayerID, Player]) onJoinRoom(room game.Room[PlayerID, Player], player Player) {
+	slf.mutex.Lock()
+	defer slf.mutex.Unlock()
+	playerId := player.GetID()
+	if len(slf.vacancy) > 0 {
+		seat := slf.vacancy[0]
+		slf.vacancy = slf.vacancy[1:]
+		slf.seatPS.Set(player.GetID(), seat)
+		slf.seatSP[seat] = &playerId
+	} else {
+		slf.seatPS.Set(player.GetID(), len(slf.seatSP))
+		slf.seatSP = append(slf.seatSP, &playerId)
+	}
+}
+
+func (slf *RoomSeat[PlayerID, Player]) onLeaveRoom(room game.Room[PlayerID, Player], player Player) {
+	seat := slf.seatPS.DeleteGet(player.GetID())
+	slf.seatSP[seat] = nil
+}
diff --git a/game/builtin/room_seat_errors.go b/game/builtin/room_seat_errors.go
new file mode 100644
index 0000000..fd69597
--- /dev/null
+++ b/game/builtin/room_seat_errors.go
@@ -0,0 +1,7 @@
+package builtin
+
+import "errors"
+
+var (
+	ErrRoomNotHasPlayer = errors.New("player not exist")
+)
diff --git a/game/room_seat.go b/game/room_seat.go
new file mode 100644
index 0000000..69f59c8
--- /dev/null
+++ b/game/room_seat.go
@@ -0,0 +1,12 @@
+package game
+
+// RoomSeat 带有座位号的房间实现
+type RoomSeat[PlayerID comparable, P Player[PlayerID]] interface {
+	Room[PlayerID, P]
+	// SetSeat 设置玩家座位号
+	SetSeat(id PlayerID, seat int) error
+	// GetSeat 获取玩家座位号
+	GetSeat(id PlayerID) (int, error)
+	// GetPlayerWithSeat 根据座位号获取玩家
+	GetPlayerWithSeat(seat int) (P, error)
+}