diff --git a/server/gameserver/android.ai.cc b/server/gameserver/android.ai.cc
index 66b9e93..440b162 100644
--- a/server/gameserver/android.ai.cc
+++ b/server/gameserver/android.ai.cc
@@ -177,7 +177,7 @@ void AndroidNewAI::DoMoveOldAI()
                 }
                 break;
             }
-            hum->room->grid_service->MoveHuman(hum);
+            hum->room->grid_service->MoveCreature(hum);
         }
     }
 }
@@ -228,7 +228,7 @@ void AndroidNewAI::UpdateNewBieNpc()
         int speed = std::max(1, (int)hum->GetSpeed());
         for (int i = 0; i < speed; ++i) {
             hum->SetPos(hum->GetPos() + hum->move_dir);
-            hum->room->grid_service->MoveHuman(hum);
+            hum->room->grid_service->MoveCreature(hum);
         }
     } else if (hum->room->GetFrameNo() - hum->enable_frameno < SERVER_FRAME_RATE * 3) {
         Human* enemy = hum->room->GetFirstNewBie();
@@ -265,7 +265,7 @@ void AndroidNewAI::UpdateLastNpc()
             a8::Vec2 old_pos = hum->GetPos();
             hum->SetPos(hum->GetPos() + hum->move_dir);
             if (!hum->room->OverBorder(hum->GetPos(), hum->meta->i->radius())) {
-                hum->room->grid_service->MoveHuman(hum);
+                hum->room->grid_service->MoveCreature(hum);
             } else {
                 hum->SetPos(old_pos);
                 break;
@@ -361,7 +361,7 @@ void AndroidNewAI::UpdateNewBieRoomLogic()
                     }
                 }
                 hum->SetPos(pos);
-                hum->room->grid_service->MoveHuman(hum);
+                hum->room->grid_service->MoveCreature(hum);
                 hum->FindLocation();
                 hum->RefreshView();
             }
@@ -380,7 +380,7 @@ void AndroidNewAI::UpdateNewBieRoomLogic()
             speed *= 0.7;
             for (int i = 0; i < speed; ++i) {
                 hum->SetPos(hum->GetPos() + hum->move_dir);
-                hum->room->grid_service->MoveHuman(hum);
+                hum->room->grid_service->MoveCreature(hum);
             }
         }
     } else {
diff --git a/server/gameserver/android.cc b/server/gameserver/android.cc
index 6e4a157..f3f70f6 100644
--- a/server/gameserver/android.cc
+++ b/server/gameserver/android.cc
@@ -62,7 +62,7 @@ void Android::InternalUpdate(int delta_time)
     }
     if (HasBuffEffect(kBET_Fly)) {
         SetPos(room->plane.curr_pos);
-        room->grid_service->MoveHuman(this);
+        room->grid_service->MoveCreature(this);
         return;
     }
     ai->Update(delta_time);
diff --git a/server/gameserver/car.cc b/server/gameserver/car.cc
index 20be5e3..569e86d 100644
--- a/server/gameserver/car.cc
+++ b/server/gameserver/car.cc
@@ -8,7 +8,7 @@
 #include "perfmonitor.h"
 #include "typeconvert.h"
 
-Car::Car():MoveableEntity()
+Car::Car():Creature()
 {
     ++PerfMonitor::Instance()->entity_num[ET_Car];
 }
@@ -20,7 +20,7 @@ Car::~Car()
 
 void Car::Initialize()
 {
-    MoveableEntity::Initialize();
+    Creature::Initialize();
     hero_meta_ = MetaMgr::Instance()->GetPlayer(meta->i->heroid());
     if (!hero_meta_) {
         abort();
@@ -172,9 +172,9 @@ void Car::SyncPos()
             if (hum != driver_) {
                 hum->SetPos(GetPos());
                 hum->move_dir = move_dir;
-                room->grid_service->MoveHuman(hum);
+                room->grid_service->MoveCreature(hum);
             }
         }
-        room->grid_service->MoveCar(this);
+        room->grid_service->MoveCreature(this);
     }
 }
diff --git a/server/gameserver/car.h b/server/gameserver/car.h
index fab9ff2..1feacd8 100644
--- a/server/gameserver/car.h
+++ b/server/gameserver/car.h
@@ -1,6 +1,6 @@
 #pragma once
 
-#include "moveableentity.h"
+#include "creature.h"
 
 #include "cs_proto.pb.h"
 
@@ -12,7 +12,7 @@ namespace MetaData
 
 class Human;
 class Room;
-class Car : public MoveableEntity
+class Car : public Creature
 {
  public:
     int car_uniid = 0;
diff --git a/server/gameserver/creature.cc b/server/gameserver/creature.cc
index a42c3a3..5f691c8 100644
--- a/server/gameserver/creature.cc
+++ b/server/gameserver/creature.cc
@@ -832,3 +832,18 @@ float Creature::GetAttrRate(int attr_id)
     float attr_rate_val = GetBuffAttrRate(attr_id);
     return attr_rate_val;
 }
+
+bool Creature::IsPlayer() const
+{
+    return IsHuman() && IsEntitySubType(EST_Player);
+}
+
+bool Creature::IsAndroid() const
+{
+    return IsHuman() && IsEntitySubType(EST_Android);
+}
+
+bool Creature::IsHuman() const
+{
+    return IsEntityType(ET_Player);
+}
diff --git a/server/gameserver/creature.h b/server/gameserver/creature.h
index 0637339..05ace61 100644
--- a/server/gameserver/creature.h
+++ b/server/gameserver/creature.h
@@ -71,8 +71,9 @@ class Creature : public MoveableEntity
     virtual std::string GetName() { return "";};
     virtual void SendDebugMsg(const std::string& debug_msg);
     virtual void DropItems(Obstacle* obstacle) {};
-    virtual bool IsPlayer() const { return false;};
-    virtual bool IsAndroid() const { return false;};
+    bool IsPlayer() const;
+    bool IsAndroid() const;
+    bool IsHuman() const;
     virtual void DecHP(float dec_hp, int killer_id, const std::string& killer_name, int weapon_id) {};
 
     RaceType_e GetRace() { return race_; }
diff --git a/server/gameserver/gridcell.cc b/server/gameserver/gridcell.cc
index e0b1d7a..94a64e9 100644
--- a/server/gameserver/gridcell.cc
+++ b/server/gameserver/gridcell.cc
@@ -7,50 +7,37 @@
 #include "room.h"
 #include "car.h"
 #include "hero.h"
+#include "creature.h"
 
 GridCell::GridCell()
 {
-    human_list_.reserve(MAX_ROOM_IDX);
-    entity_list_.reserve(MAX_ROOM_IDX);
-    bullet_list_.reserve(MAX_ROOM_IDX);
+    entitys_.reserve(MAX_ROOM_IDX);
+    bullets_.reserve(MAX_ROOM_IDX);
+    creatures_.reserve(MAX_ROOM_IDX);
     for (int i = 0; i < MAX_ROOM_IDX; ++i) {
-        human_list_.push_back(std::set<Human*>());
-        entity_list_.push_back(std::set<Entity*>());
-        bullet_list_.push_back(std::set<Bullet*>());
-        car_list_.push_back(std::set<Car*>());
-        hero_list_.push_back(std::set<Hero*>());
+        entitys_.push_back(std::set<Entity*>());
+        bullets_.push_back(std::set<Bullet*>());
+        creatures_.push_back(std::set<Creature*>());
     }
 }
 
 
 void GridCell::ClearRoomData(Room* room)
 {
-    human_list_[room->GetRoomIdx()].clear();
-    entity_list_[room->GetRoomIdx()].clear();
-    bullet_list_[room->GetRoomIdx()].clear();
-    bullet_list_[room->GetRoomIdx()].clear();
-}
-
-void GridCell::AddHuman(Human* hum)
-{
-    human_list_[hum->room->GetRoomIdx()].insert(hum);
-}
-
-void GridCell::RemoveHuman(Human* hum)
-{
-    human_list_[hum->room->GetRoomIdx()].erase(hum);
-}
-
-bool GridCell::ExistsHuman(Human* hum)
-{
-    return human_list_[hum->room->GetRoomIdx()].find(hum) != human_list_[hum->room->GetRoomIdx()].end();
+    entitys_[room->GetRoomIdx()].clear();
+    bullets_[room->GetRoomIdx()].clear();
+    creatures_[room->GetRoomIdx()].clear();
 }
 
 void GridCell::TouchHumanList(std::function<void (Human*, bool&)>& func,
                               int room_idx,
                               bool& stop)
 {
-    for (Human* hum : human_list_[room_idx]) {
+    for (Creature* c : creatures_[room_idx]) {
+        if (!c->IsHuman()) {
+            continue;
+        }
+        Human* hum = (Human*)c;
         func(hum, stop);
         if (stop) {
             return;
@@ -67,62 +54,42 @@ void GridCell::TouchHumanListEx(std::function<void (Human*, bool&)> func,
 
 void GridCell::AddBullet(Bullet* bullet)
 {
-    bullet_list_[bullet->room->GetRoomIdx()].insert(bullet);
+    bullets_[bullet->room->GetRoomIdx()].insert(bullet);
 }
 
 void GridCell::RemoveBullet(Bullet* bullet)
 {
-    bullet_list_[bullet->room->GetRoomIdx()].erase(bullet);
-}
-
-void GridCell::AddCar(Car* car)
-{
-    car_list_[car->room->GetRoomIdx()].insert(car);
-}
-
-void GridCell::RemoveCar(Car* car)
-{
-    car_list_[car->room->GetRoomIdx()].erase(car);
-}
-
-void GridCell::AddHero(Hero* hero)
-{
-    hero_list_[hero->room->GetRoomIdx()].insert(hero);
-}
-
-void GridCell::RemoveHero(Hero* hero)
-{
-    hero_list_[hero->room->GetRoomIdx()].erase(hero);
+    bullets_[bullet->room->GetRoomIdx()].erase(bullet);
 }
 
 void GridCell::AddPermanentEntity(Entity* entity)
 {
-    entity_list_[0].insert(entity);
+    entitys_[0].insert(entity);
 }
 
 void GridCell::AddRoomEntity(Room* room, Entity* entity)
 {
-    entity_list_[room->GetRoomIdx()].insert(entity);
+    entitys_[room->GetRoomIdx()].insert(entity);
 }
 
 void GridCell::RemoveRoomEntity(Room* room, Entity* entity)
 {
-    entity_list_[room->GetRoomIdx()].erase(entity);
+    entitys_[room->GetRoomIdx()].erase(entity);
 }
 
-bool GridCell::ExistsEntity(Room* room, Entity* entity)
+bool GridCell::EntityExists(Room* room, Entity* entity)
 {
-    if (entity_list_[0].find(entity) != entity_list_[0].end()) {
+    if (entitys_[0].find(entity) != entitys_[0].end()) {
         return true;
     }
-    return entity_list_[room->GetRoomIdx()].find(entity)  !=
-        entity_list_[room->GetRoomIdx()].end();
+    return entitys_[room->GetRoomIdx()].find(entity)  !=
+        entitys_[room->GetRoomIdx()].end();
 }
 
 void GridCell::TouchLayer0EntityList(std::function<void (Entity*, bool&)>& func,
                                      bool& stop)
 {
-    for (Entity* entity : entity_list_[0]) {
+    for (Entity* entity : entitys_[0]) {
         func(entity, stop);
         if (stop) {
             return;
@@ -134,7 +101,7 @@ void GridCell::TouchLayer1EntityList(std::function<void (Entity*, bool&)>& func,
                                      int room_idx,
                                      bool& stop)
 {
-    for (Entity* entity : entity_list_[room_idx]) {
+    for (Entity* entity : entitys_[room_idx]) {
         func(entity, stop);
         if (stop) {
             return;
@@ -151,3 +118,18 @@ void GridCell::TouchAllLayerEntityList(std::function<void (Entity*, bool&)>& fun
         TouchLayer1EntityList(func, room_idx, stop);
     }
 }
+
+void GridCell::AddCreature(Creature* c)
+{
+    creatures_[c->room->GetRoomIdx()].insert(c);
+}
+
+void GridCell::RemoveCreature(Creature* c)
+{
+    creatures_[c->room->GetRoomIdx()].erase(c);
+}
+
+bool GridCell::CreatureExists(Creature* c)
+{
+    return creatures_[c->room->GetRoomIdx()].find(c) != creatures_[c->room->GetRoomIdx()].end();
+}
diff --git a/server/gameserver/gridcell.h b/server/gameserver/gridcell.h
index 3c56d08..8c3f1b0 100644
--- a/server/gameserver/gridcell.h
+++ b/server/gameserver/gridcell.h
@@ -4,8 +4,7 @@ class Entity;
 class Human;
 class Bullet;
 class Room;
-class Car;
-class Hero;
+class Creature;
 
 class GridCell
 {
@@ -13,9 +12,7 @@ public:
 
     GridCell();
     void ClearRoomData(Room* room);
-    void AddHuman(Human* hum);
-    void RemoveHuman(Human* hum);
-    bool ExistsHuman(Human* hum);
+
     void TouchHumanList(std::function<void (Human*, bool&)>& func,
                         int room_idx,
                         bool& stop);
@@ -23,16 +20,15 @@ public:
                           int room_idx,
                           bool& stop);
 
+    void AddCreature(Creature* c);
+    void RemoveCreature(Creature* c);
+    bool CreatureExists(Creature* c);
     void AddBullet(Bullet* bullet);
     void RemoveBullet(Bullet* bullet);
-    void AddCar(Car* car);
-    void RemoveCar(Car* car);
-    void AddHero(Hero* hero);
-    void RemoveHero(Hero* hero);
     void AddPermanentEntity(Entity* entity);
     void AddRoomEntity(Room* room, Entity* entity);
     void RemoveRoomEntity(Room* room, Entity* entity);
-    bool ExistsEntity(Room* room, Entity* Entity);
+    bool EntityExists(Room* room, Entity* Entity);
     void TouchLayer0EntityList(std::function<void (Entity*, bool&)>& func,
                                bool& stop);
     void TouchLayer1EntityList(std::function<void (Entity*, bool&)>& func,
@@ -43,9 +39,7 @@ public:
                                  bool& stop);
 
 private:
-    std::vector<std::set<Human*>> human_list_;
-    std::vector<std::set<Entity*>> entity_list_;
-    std::vector<std::set<Bullet*>> bullet_list_;
-    std::vector<std::set<Car*>> car_list_;
-    std::vector<std::set<Hero*>> hero_list_;
+    std::vector<std::set<Entity*>> entitys_;
+    std::vector<std::set<Bullet*>> bullets_;
+    std::vector<std::set<Creature*>> creatures_;
 };
diff --git a/server/gameserver/gridservice.cc b/server/gameserver/gridservice.cc
index c455592..2014a85 100644
--- a/server/gameserver/gridservice.cc
+++ b/server/gameserver/gridservice.cc
@@ -5,8 +5,6 @@
 #include "bullet.h"
 #include "room.h"
 #include "gridcell.h"
-#include "car.h"
-#include "hero.h"
 
 /*
   1 2 3
@@ -102,25 +100,31 @@ void GridService::ClearRoomData(Room* room)
     }
 }
 
-void GridService::AddHuman(Human* hum)
+void GridService::AddCreature(Creature* c)
 {
-    int x = (int)hum->GetX() + cell_width_;
-    int y = (int)hum->GetY() + cell_width_;
+    int x = (int)c->GetX() + cell_width_;
+    int y = (int)c->GetY() + cell_width_;
     if (BroderOverFlow(x, y)) {
         abort();
     }
-    hum->SetGridId(x/cell_width_ + (y/cell_width_) * cell_count_per_row_);
-    if (hum->GetGridId() == 0 || hum->GetGridId() > max_grid_id_) {
+    c->SetGridId(x/cell_width_ + (y/cell_width_) * cell_count_per_row_);
+    if (c->GetGridId() == 0 || c->GetGridId() > max_grid_id_) {
         abort();
     }
-    cells_[hum->GetGridId()].AddHuman(hum);
-    GetAllCells(hum->room, hum->GetGridId(), hum->GetGridList());
+    cells_[c->GetGridId()].AddCreature(c);
+    GetAllCells(c->room, c->GetGridId(), c->GetGridList());
 }
 
-void GridService::MoveHuman(Human* hum)
+void GridService::RemoveCreature(Creature* c)
 {
-    int new_x = (int)hum->GetX() + cell_width_;
-    int new_y = (int)hum->GetY() + cell_width_;
+    GridCell& cell = cells_[c->GetGridId()];
+    cell.RemoveCreature(c);
+}
+
+void GridService::MoveCreature(Creature* c)
+{
+    int new_x = (int)c->GetX() + cell_width_;
+    int new_y = (int)c->GetY() + cell_width_;
     int new_grid_id = new_x/cell_width_ + (new_y/cell_width_) * cell_count_per_row_;
     if (BroderOverFlow(new_x, new_y)) {
         abort();
@@ -128,20 +132,20 @@ void GridService::MoveHuman(Human* hum)
     if (new_grid_id == 0 || new_grid_id > max_grid_id_) {
         abort();
     }
-    if (new_grid_id != hum->GetGridId()) {
+    if (new_grid_id != c->GetGridId()) {
         std::set<GridCell*> inc_grid_list;
         std::set<GridCell*> dec_grid_list;
-        std::set<GridCell*> old_grid_list = hum->GetGridList();
-        ComputeDiff(hum->room,
-                    hum->GetGridId(),
+        std::set<GridCell*> old_grid_list = c->GetGridList();
+        ComputeDiff(c->room,
+                    c->GetGridId(),
                     new_grid_id,
-                    hum->GetGridList(),
+                    c->GetGridList(),
                     inc_grid_list,
                     dec_grid_list);
-        cells_[hum->GetGridId()].RemoveHuman(hum);
-        cells_[new_grid_id].AddHuman(hum);
-        hum->SetGridId(new_grid_id);
-        hum->OnGridListChange(old_grid_list, inc_grid_list, dec_grid_list);
+        cells_[c->GetGridId()].RemoveCreature(c);
+        cells_[new_grid_id].AddCreature(c);
+        c->SetGridId(new_grid_id);
+        c->OnGridListChange(old_grid_list, inc_grid_list, dec_grid_list);
     }
 }
 
@@ -193,104 +197,6 @@ void GridService::DelBullet(Bullet* bullet)
     cell.RemoveBullet(bullet);
 }
 
-void GridService::AddCar(Car* car)
-{
-    int x = (int)car->GetX() + cell_width_;
-    int y = (int)car->GetY() + cell_width_;
-    if (BroderOverFlow(x, y)) {
-        abort();
-    }
-    car->SetGridId(x/cell_width_ + (y/cell_width_) * cell_count_per_row_);
-    if (car->GetGridId() == 0 || car->GetGridId() > max_grid_id_) {
-        abort();
-    }
-    cells_[car->GetGridId()].AddCar(car);
-    GetAllCells(car->room, car->GetGridId(), car->GetGridList());
-}
-
-void GridService::MoveCar(Car* car)
-{
-    int new_x = (int)car->GetX() + cell_width_;
-    int new_y = (int)car->GetY() + cell_width_;
-    int new_grid_id = new_x/cell_width_ + (new_y/cell_width_) * cell_count_per_row_;
-    if (BroderOverFlow(new_x, new_y)) {
-        abort();
-    }
-    if (new_grid_id == 0 || new_grid_id > max_grid_id_) {
-        abort();
-    }
-    if (new_grid_id != car->GetGridId()) {
-        std::set<GridCell*> inc_grid_list;
-        std::set<GridCell*> dec_grid_list;
-        std::set<GridCell*> old_grid_list = car->GetGridList();
-        ComputeDiff(car->room,
-                    car->GetGridId(),
-                    new_grid_id,
-                    car->GetGridList(),
-                    inc_grid_list,
-                    dec_grid_list);
-        cells_[car->GetGridId()].RemoveCar(car);
-        cells_[new_grid_id].AddCar(car);
-        car->SetGridId(new_grid_id);
-        car->OnGridListChange(old_grid_list, inc_grid_list, dec_grid_list);
-    }
-}
-
-void GridService::DelCar(Car* car)
-{
-    GridCell& cell = cells_[car->GetGridId()];
-    cell.RemoveCar(car);
-}
-
-void GridService::AddHero(Hero* hero)
-{
-    int x = (int)hero->GetX() + cell_width_;
-    int y = (int)hero->GetY() + cell_width_;
-    if (BroderOverFlow(x, y)) {
-        abort();
-    }
-    hero->SetGridId(x/cell_width_ + (y/cell_width_) * cell_count_per_row_);
-    if (hero->GetGridId() == 0 || hero->GetGridId() > max_grid_id_) {
-        abort();
-    }
-    cells_[hero->GetGridId()].AddHero(hero);
-    GetAllCells(hero->room, hero->GetGridId(), hero->GetGridList());
-}
-
-void GridService::MoveHero(Hero* hero)
-{
-    int new_x = (int)hero->GetX() + cell_width_;
-    int new_y = (int)hero->GetY() + cell_width_;
-    int new_grid_id = new_x/cell_width_ + (new_y/cell_width_) * cell_count_per_row_;
-    if (BroderOverFlow(new_x, new_y)) {
-        abort();
-    }
-    if (new_grid_id == 0 || new_grid_id > max_grid_id_) {
-        abort();
-    }
-    if (new_grid_id != hero->GetGridId()) {
-        std::set<GridCell*> inc_grid_list;
-        std::set<GridCell*> dec_grid_list;
-        std::set<GridCell*> old_grid_list = hero->GetGridList();
-        ComputeDiff(hero->room,
-                    hero->GetGridId(),
-                    new_grid_id,
-                    hero->GetGridList(),
-                    inc_grid_list,
-                    dec_grid_list);
-        cells_[hero->GetGridId()].RemoveHero(hero);
-        cells_[new_grid_id].AddHero(hero);
-        hero->SetGridId(new_grid_id);
-        hero->OnGridListChange(old_grid_list, inc_grid_list, dec_grid_list);
-    }
-}
-
-void GridService::DelHero(Hero* hero)
-{
-    GridCell& cell = cells_[hero->GetGridId()];
-    cell.RemoveHero(hero);
-}
-
 void GridService::AddRoomEntity(Room* room, Entity* entity)
 {
     assert(!entity->IsEntityType(ET_Player));
@@ -327,10 +233,10 @@ void GridService::AddPermanentEntity(Entity* entity)
     cells_[entity->GetGridId()].AddPermanentEntity(entity);
 }
 
-bool GridService::HumanInGridList(Human* hum, std::set<GridCell*>& grid_list)
+bool GridService::CreatureInGridList(Creature* c, std::set<GridCell*>& grid_list)
 {
     for (auto& cell : grid_list) {
-        if (cell->ExistsHuman(hum)) {
+        if (cell->CreatureExists(c)) {
             return true;
         }
     }
@@ -340,7 +246,7 @@ bool GridService::HumanInGridList(Human* hum, std::set<GridCell*>& grid_list)
 bool GridService::EntityInGridList(Room* room, Entity* entity, std::set<GridCell*>& grid_list)
 {
     for (auto& cell : grid_list) {
-        if (cell->ExistsEntity(room, entity)) {
+        if (cell->EntityExists(room, entity)) {
             return true;
         }
     }
@@ -484,7 +390,7 @@ void GridService::DeatchHuman(Human* target)
              },
              target->room->GetRoomIdx(),
              stop);
-        cell->RemoveHuman(target);
+        cell->RemoveCreature(target);
     }
     target->SetGridId(0);
     target->GetGridList().clear();
diff --git a/server/gameserver/gridservice.h b/server/gameserver/gridservice.h
index 7c03830..6533fdd 100644
--- a/server/gameserver/gridservice.h
+++ b/server/gameserver/gridservice.h
@@ -4,8 +4,7 @@ class Human;
 class Entity;
 class Room;
 class Bullet;
-class Car;
-class Hero;
+class Creature;
 class GridCell;
 class GridService
 {
@@ -21,27 +20,20 @@ class GridService
     bool CanAdd(float x, float y);
     void ClearRoomData(Room* room);
 
-    void AddHuman(Human* hum);
-    void MoveHuman(Human* hum);
+    void AddCreature(Creature* c);
+    void RemoveCreature(Creature* c);
+    void MoveCreature(Creature* c);
 
     void AddBullet(Bullet* bullet);
     void MoveBullet(Bullet* bullet);
     void DelBullet(Bullet* bullet);
 
-    void AddCar(Car* car);
-    void MoveCar(Car* car);
-    void DelCar(Car* car);
-
-    void AddHero(Hero* hero);
-    void MoveHero(Hero* hero);
-    void DelHero(Hero* hero);
-
     void AddRoomEntity(Room* room, Entity* entity);
     void DelRoomEntity(Room* room, Entity* entity);
 
     void AddPermanentEntity(Entity* entity);
 
-    bool HumanInGridList(Human* hum, std::set<GridCell*>& grid_list);
+    bool CreatureInGridList(Creature* c, std::set<GridCell*>& grid_list);
     bool EntityInGridList(Room* room, Entity* entity, std::set<GridCell*>& grid_list);
     bool InView(int a_grid, int b_grid);
     bool InView(int grid_id, float x, float y);
diff --git a/server/gameserver/hero.cc b/server/gameserver/hero.cc
index ea6c9ab..073eefd 100644
--- a/server/gameserver/hero.cc
+++ b/server/gameserver/hero.cc
@@ -91,7 +91,7 @@ void Hero::InternalUpdateMove(float speed)
 
     SetPos(new_pos);
     if (!IsCollisionInMapService()) {
-        room->grid_service->MoveHero(this);
+        room->grid_service->MoveCreature(this);
     } else {
         if (on_move_collision && !on_move_collision()) {
             SetPos(old_pos);
diff --git a/server/gameserver/human.cc b/server/gameserver/human.cc
index c12cdb4..10cf9e3 100644
--- a/server/gameserver/human.cc
+++ b/server/gameserver/human.cc
@@ -2133,7 +2133,7 @@ void Human::_InternalUpdateMove(float speed)
     #if 1
     SetPos(old_pos + a8::Vec2(nx, ny));
     if (!IsCollisionInMapService()) {
-        room->grid_service->MoveHuman(this);
+        room->grid_service->MoveCreature(this);
         return;
     } else {
         if (Global::last_collider && Global::last_collider->type == CT_Circle) {
@@ -2148,7 +2148,7 @@ void Human::_InternalUpdateMove(float speed)
                 SetPos(GetPos() + new_dir);
             }
             if (!IsCollisionInMapService()) {
-                room->grid_service->MoveHuman(this);
+                room->grid_service->MoveCreature(this);
                 return;
             }
         }
@@ -2174,7 +2174,7 @@ void Human::_InternalUpdateMove(float speed)
     }
 
     SetPos(old_pos + a8::Vec2(nx, ny));
-    room->grid_service->MoveHuman(this);
+    room->grid_service->MoveCreature(this);
 }
 
 void Human::ClearFrameData()
@@ -2730,7 +2730,7 @@ void Human::FindLocationWithTarget(Entity* target)
     float distance = (new_pos - old_pos).Norm();
     for (int i = distance; i < 10000000; i += 5) {
         SetPos(old_pos + new_pos_dir * i);
-        room->grid_service->MoveHuman(this);
+        room->grid_service->MoveCreature(this);
 
         Entity* building = nullptr;
         std::set<GridCell*> tmp_grids;
@@ -2915,16 +2915,6 @@ void Human::DecItem(int item_id, int item_num)
     }
 }
 
-bool Human::IsPlayer() const
-{
-    return IsEntitySubType(EST_Player);
-}
-
-bool Human::IsAndroid() const
-{
-    return IsEntitySubType(EST_Android);
-}
-
 void Human::DropItems(Obstacle* obstacle)
 {
     bool is_treasure_box = false;
@@ -3101,7 +3091,7 @@ void Human::OnEnable()
 {
     a8::UnSetBitFlag(status, HS_Disable);
     enable_frameno = room->GetFrameNo();
-    room->grid_service->AddHuman(this);
+    room->grid_service->MoveCreature(this);
     FindLocation();
     RefreshView();
 }
@@ -3191,7 +3181,7 @@ void Human::ProcIncGridList(std::set<GridCell*>& old_grids,
          inc_grids,
          [this, &old_grids] (Human* hum, bool& stop)
          {
-            if (!room->grid_service->HumanInGridList(hum, old_grids)) {
+            if (!room->grid_service->CreatureInGridList(hum, old_grids)) {
                 hum->AddToNewObjects(this);
                 hum->AddToPartObjects(this);
                 hum->RemoveOutObjects(this);
@@ -3233,7 +3223,7 @@ void Human::ProcDecGridList(std::set<GridCell*>& old_grids,
          dec_grids,
          [this] (Human* hum, bool& stop)
          {
-             if (!room->grid_service->HumanInGridList(hum, GetGridList())) {
+             if (!room->grid_service->CreatureInGridList(hum, GetGridList())) {
                 AddOutObjects(hum);
                 hum->AddOutObjects(this);
                 #ifdef DEBUG
@@ -3476,7 +3466,7 @@ void Human::OnLand()
             for (const a8::Vec2& dir : dirs) {
                 SetPos(old_pos + dir * i);
                 if (!IsCollisionInMapService()) {
-                    room->grid_service->MoveHuman(this);
+                    room->grid_service->MoveCreature(this);
                     return;
                 }
             }
diff --git a/server/gameserver/human.h b/server/gameserver/human.h
index 986204a..5704526 100644
--- a/server/gameserver/human.h
+++ b/server/gameserver/human.h
@@ -240,8 +240,6 @@ class Human : public Creature
     int GetItemNum(int item_id);
     void AddItem(int item_id, int item_num);
     void DecItem(int item_id, int item_num);
-    virtual bool IsPlayer() const override;
-    virtual bool IsAndroid() const override;
     virtual void DropItems(Obstacle* obstacle) override;
     void ProcNewBieLogic();
     void OnEnable();
diff --git a/server/gameserver/moveableentity.cc b/server/gameserver/moveableentity.cc
index c615aa0..c8c75db 100644
--- a/server/gameserver/moveableentity.cc
+++ b/server/gameserver/moveableentity.cc
@@ -46,7 +46,7 @@ void MoveableEntity::OnGridListChange(std::set<GridCell*>& old_grids,
              inc_grids,
              [this, &old_grids] (Human* hum, bool& stop)
              {
-                 if (!room->grid_service->HumanInGridList(hum, old_grids)) {
+                 if (!room->grid_service->CreatureInGridList(hum, old_grids)) {
                      hum->AddToNewObjects(this);
                      hum->AddToPartObjects(this);
                      hum->RemoveOutObjects(this);
@@ -60,7 +60,7 @@ void MoveableEntity::OnGridListChange(std::set<GridCell*>& old_grids,
              dec_grids,
              [this] (Human* hum, bool& stop)
              {
-                 if (!room->grid_service->HumanInGridList(hum, GetGridList())) {
+                 if (!room->grid_service->CreatureInGridList(hum, GetGridList())) {
                      hum->AddOutObjects(this);
                  }
              });
diff --git a/server/gameserver/player.cc b/server/gameserver/player.cc
index 4a1e2cf..e6b6d3d 100644
--- a/server/gameserver/player.cc
+++ b/server/gameserver/player.cc
@@ -58,7 +58,7 @@ void Player::InternalUpdate(int delta_time)
     }
     if (HasBuffEffect(kBET_Fly)) {
         SetPos(room->plane.curr_pos);
-        room->grid_service->MoveHuman(this);
+        room->grid_service->MoveCreature(this);
         #ifdef DEBUG
         if (GetCar() && GetCar()->IsDriver(this)) {
             GetCar()->SyncPos();
diff --git a/server/gameserver/room.cc b/server/gameserver/room.cc
index 40e4235..edbfb70 100644
--- a/server/gameserver/room.cc
+++ b/server/gameserver/room.cc
@@ -237,7 +237,7 @@ void Room::AddPlayer(Player* hum)
     alive_count_chged_frameno_ = GetFrameNo();
     ++PerfMonitor::Instance()->alive_count;
 
-    grid_service->AddHuman(hum);
+    grid_service->AddCreature(hum);
     hum->FindLocation();
     hum->RefreshView();
     AddPlayerPostProc(hum);
@@ -352,7 +352,7 @@ void Room::CreateAndroid(int robot_num)
         } else {
             AddToAliveHumanHash(hum);
             AddToMoveableHash(hum);
-            grid_service->AddHuman(hum);
+            grid_service->AddCreature(hum);
             hum->FindLocation();
             hum->RefreshView();
         }
@@ -564,7 +564,7 @@ Car* Room::CreateCar(Human* driver,
     }
     car->Initialize();
     AddToEntityHash(car);
-    grid_service->AddCar(car);
+    grid_service->AddCreature(car);
     car->RefreshView();
     car->BroadcastFullState(this);
     return car;
@@ -584,7 +584,7 @@ Hero* Room::CreateHero(Creature* master,
     hero->Initialize();
     AddToEntityHash(hero);
     AddToMoveableHash(hero);
-    grid_service->AddHero(hero);
+    grid_service->AddCreature(hero);
     hero->RefreshView();
     return hero;
 }
@@ -618,7 +618,7 @@ void Room::RemoveObjectLater(RoomEntity* entity)
                 {
                     entity->RemoveFromAroundPlayers(entity->room);
                     entity->BroadcastDeleteState(entity->room);
-                    entity->room->grid_service->DelCar((Car*)entity);
+                    entity->room->grid_service->RemoveCreature((Car*)entity);
                     entity->room->RemoveFromMoveableHash((Car*)entity);
                 }
                 break;
@@ -1685,7 +1685,7 @@ void Room::ShuaPlane()
         pair.second->SetPos(plane.curr_pos);
         pair.second->attack_dir = plane.dir;
         pair.second->move_dir = plane.dir;
-        grid_service->MoveHuman(pair.second);
+        grid_service->MoveCreature(pair.second);
         pair.second->AddToNewObjects(pair.second);
     }
 }
@@ -3029,7 +3029,7 @@ void Room::CombineTeamBornPoint()
             if (!a8::HasBitFlag(hum->status, HS_Disable)) {
                 hum->FindLocation();
                 hum->RefreshView();
-                grid_service->MoveHuman(hum);
+                grid_service->MoveCreature(hum);
             } else if (room_type_ == RT_MidBrid && !hum->team_uuid.empty()){
                 EnableHuman(hum);
             }
@@ -3050,7 +3050,7 @@ void Room::ForceSetBornPoint(Human* hum, BornPoint* born_point)
         }
         hum->FindLocation();
         hum->RefreshView();
-        grid_service->MoveHuman(hum);
+        grid_service->MoveCreature(hum);
     }
 }