diff --git a/server/gameserver/framemaker.cc b/server/gameserver/framemaker.cc
index 3d3829ae..c9e975f5 100644
--- a/server/gameserver/framemaker.cc
+++ b/server/gameserver/framemaker.cc
@@ -10,6 +10,7 @@
 #include "car.h"
 #include "app.h"
 #include "perfmonitor.h"
+#include "incubator.h"
 
 void FrameMaker::Debug_FullObject(Human* hum)
 {
@@ -164,6 +165,10 @@ void FrameMaker::PostProcess(cs::SMUpdate* msg, Room* room, Human* hum, FrameDat
         room->GetFrameNo() - hum->join_frameno <= 2) {
         msg->set_alive_count(room->AliveCount());
     }
+    if (room->IsPveRoom()) {
+        int left_time = room->GetIncubator()->GetPveLeftTime();
+        msg->set_game_left_time(left_time);
+    }
 }
 
 void FrameMaker::SerializeLootObjects(cs::SMUpdate* msg, Room* room, Human* hum, FrameData* framedata)
diff --git a/server/gameserver/incubator.cc b/server/gameserver/incubator.cc
index 9797da90..e287fd74 100644
--- a/server/gameserver/incubator.cc
+++ b/server/gameserver/incubator.cc
@@ -20,15 +20,12 @@ void Incubator::Init()
          },
          &xtimer_attacher_.timer_list_);
     if (room->IsPveRoom()) {
-        #if 0
-        room->pve_data.wave = 1;
-        #endif
         room->pve_data.max_wave = room->pve_mode_meta->mode_time.size();
         int wave = 0;
         int total_time = 0;
         for (int time : room->pve_mode_meta->mode_time) {
             total_time += time;
-            room->xtimer.AddDeadLineTimerAndAttach
+            xtimer_list* timer = room->xtimer.AddDeadLineTimerAndAttach
                 (
                  total_time * SERVER_FRAME_RATE / 2,
                  a8::XParams()
@@ -40,6 +37,7 @@ void Incubator::Init()
                      incubator->SpawnWaveMon(param.param1.GetInt());
                  },
                  &xtimer_attacher_.timer_list_);
+            wave_timers_.push_back(timer);
             ++wave;
         }
     }
@@ -248,6 +246,7 @@ void Incubator::SpawnWaveMon(int wave)
     if (room->IsGameOver()) {
         return;
     }
+    curr_wave_ = wave;
     room->OnEnterNewWave(wave);
     if (wave < 0) {
         abort();
@@ -308,3 +307,14 @@ void Incubator::SpawnWaveMon(int wave)
     }
     ++room->pve_data.wave;
 }
+
+int Incubator::GetPveLeftTime()
+{
+    if (curr_wave_ >= wave_timers_.size() ||
+        curr_wave_ < 0) {
+        abort();
+    }
+    xtimer_list* timer = wave_timers_[curr_wave_];
+    int remain_time = room->xtimer.GetRemainTime(timer);
+    return remain_time * FRAME_RATE_MS;
+}
diff --git a/server/gameserver/incubator.h b/server/gameserver/incubator.h
index 621ab255..41d0e225 100644
--- a/server/gameserver/incubator.h
+++ b/server/gameserver/incubator.h
@@ -15,6 +15,7 @@ class Incubator
     void RecycleAndroid(Human* hum);
     void ActiveAndroid(Human* hum, Human* android);
     bool IsTimeOut() { return timeout_; };
+    int GetPveLeftTime();
 
 private:
     bool CanSee(Human* hum, Human* exclude_hum);
@@ -22,7 +23,9 @@ private:
     void SpawnWaveMon(int wave);
 
 private:
+    int curr_wave_= 0;
     bool timeout_ = false;
     std::vector<Human*> hold_humans_;
+    std::vector<xtimer_list*> wave_timers_;
     a8::XTimerAttacher xtimer_attacher_;
 };