diff --git a/src/epdgui/epdgui.cpp b/src/epdgui/epdgui.cpp
index ffb348d..3c46a24 100644
--- a/src/epdgui/epdgui.cpp
+++ b/src/epdgui/epdgui.cpp
@@ -16,8 +16,12 @@ std::stack <Frame_Base*> frame_stack;
 std::map<String, frame_struct_t> frame_map;
 uint8_t frame_switch_count = 0;
 bool _is_auto_update = true;
+
+uint16_t _is_last_finger_up = 0xFFFF;
 uint16_t _last_pos_x = 0xFFFF, _last_pos_y = 0xFFFF;
 
+uint32_t g_last_active_time_millis = 0;
+
 void EPDGUI_AddObject(EPDGUI_Base* object)
 {
     object->SetID(obj_id);
@@ -102,11 +106,16 @@ void EPDGUI_Run(Frame_Base* frame)
         if (M5.TP.avaliable())
         {
             M5.TP.update();
-            bool is_finger_up = M5.TP.isFingerUp();
-            if(is_finger_up || (_last_pos_x != M5.TP.readFingerX(0)) || (_last_pos_y != M5.TP.readFingerY(0)))
+            uint16_t is_finger_up = M5.TP.isFingerUp() ? 1 : 0;
+            uint16_t pos_x = M5.TP.readFingerX(0);
+            uint16_t pos_y = M5.TP.readFingerY(0);
+            // Avoid duplicate events
+            if (_is_last_finger_up != is_finger_up || _last_pos_x != pos_x || _last_pos_y != pos_y)
             {
-                _last_pos_x = M5.TP.readFingerX(0);
-                _last_pos_y = M5.TP.readFingerY(0);
+                EPDGUI_UpdateGlobalLastActiveTime();
+                _last_pos_x = pos_x;
+                _last_pos_y = pos_y;
+                _is_last_finger_up = is_finger_up;
                 if(is_finger_up)
                 {
                     EPDGUI_Process();
@@ -114,7 +123,7 @@ void EPDGUI_Run(Frame_Base* frame)
                 }
                 else
                 {
-                    EPDGUI_Process(M5.TP.readFingerX(0), M5.TP.readFingerY(0));
+                    EPDGUI_Process(pos_x, pos_y);
                     last_active_time = 0;
                 }
             }
@@ -211,3 +220,9 @@ void EPDGUI_SetAutoUpdate(bool isAuto)
 {
     _is_auto_update = isAuto;
 }
+
+/// Update active time to avoid power saving
+void EPDGUI_UpdateGlobalLastActiveTime()
+{
+    g_last_active_time_millis = millis();
+}
diff --git a/src/epdgui/epdgui.h b/src/epdgui/epdgui.h
index 30ed0d6..c6437dc 100644
--- a/src/epdgui/epdgui.h
+++ b/src/epdgui/epdgui.h
@@ -24,4 +24,8 @@ void EPDGUI_AddFrameArg(String name, int n, void* arg);
 Frame_Base* EPDGUI_GetFrame(String name);
 void EPDGUI_SetAutoUpdate(bool isAuto);
 
+extern uint32_t g_last_active_time_millis;
+
+void EPDGUI_UpdateGlobalLastActiveTime();
+
 #endif //__EPDGUI_H
\ No newline at end of file
diff --git a/src/frame/frame_base.cpp b/src/frame/frame_base.cpp
index dd82583..911c748 100644
--- a/src/frame/frame_base.cpp
+++ b/src/frame/frame_base.cpp
@@ -15,6 +15,7 @@ Frame_Base::Frame_Base(bool _has_title)
     }
     _frame_id = 0;
     _frame_name = "Frame_Base";
+    EPDGUI_UpdateGlobalLastActiveTime();
 }
 
 Frame_Base::~Frame_Base() 
@@ -23,6 +24,10 @@ Frame_Base::~Frame_Base()
         delete _key_exit;
     if(_canvas_title != NULL)
         delete _canvas_title;
+    if (_canvas_footer != NULL)
+    {
+        delete _canvas_footer;
+    }
 }
 
 void Frame_Base::exitbtn(String title, uint16_t width)
@@ -38,8 +43,48 @@ void Frame_Base::exitbtn(String title, uint16_t width)
     _key_exit->CanvasPressed()->ReverseColor();
 }
 
+void Frame_Base::CheckAutoPowerSave()
+{
+    unsigned long now = millis();
+    int footer_height = 28;
+    int margin_bottom = 10;
+    if (now - g_last_active_time_millis > TIME_BEFORE_SHUTDOWN_MS)
+    {
+        log_d("The idle time reached, shutdown now.");
+        Shutdown();
+    }
+    else if (now - g_last_active_time_millis > TIME_BEFORE_SHUTDOWN_PROMPT_MS)
+    {
+        if (!_shutdown_prompt_is_shown)
+        {
+            log_d("Show shutdown prompt");
+            _canvas_footer = new M5EPD_Canvas(&M5.EPD);
+            _canvas_footer->createCanvas(540, footer_height);
+            _canvas_footer->setTextSize(26);
+            _canvas_footer->setTextDatum(CC_DATUM);
+            char buf[128];
+            sprintf(buf, "Shutdown to save power, touch to continue?");
+            _canvas_footer->drawString(buf, 270, footer_height / 2);
+            _canvas_footer->pushCanvas(0, 960 - footer_height - margin_bottom, UPDATE_MODE_DU4);
+            _shutdown_prompt_is_shown = true;
+        }
+    }
+    else if (_shutdown_prompt_is_shown)
+    {
+        // active again and _shutdown_prompt_is_shown == true, hide prompt
+        log_d("Become active again, hide prompt");
+        _canvas_footer->fillCanvas(0);
+        _canvas_footer->pushCanvas(0, 960 - footer_height - margin_bottom, UPDATE_MODE_DU4);
+        _shutdown_prompt_is_shown = false;
+    }
+}
+
 int Frame_Base::run(void)
 {
+    if (ENABLE_AUTO_POWER_SAVE)
+    {
+        CheckAutoPowerSave();
+    }
     return _is_run;
 }
 
diff --git a/src/frame/frame_base.h b/src/frame/frame_base.h
index 0e6f430..a56c7a7 100644
--- a/src/frame/frame_base.h
+++ b/src/frame/frame_base.h
@@ -21,11 +21,16 @@ class Frame_Base
     uint32_t GetFrameID() {return _frame_id;}
 protected:
     static void exit_cb(epdgui_args_vector_t &args);
+    void UpdateLastActiveTime();
     String _frame_name;
     int _is_run = 1;
     M5EPD_Canvas *_canvas_title = NULL;
+    M5EPD_Canvas *_canvas_footer = NULL;
     EPDGUI_Button *_key_exit = NULL;
     uint32_t _frame_id;
+private:
+    bool _shutdown_prompt_is_shown = false;
+    void CheckAutoPowerSave();
 };
 
 
diff --git a/src/frame/frame_compare.cpp b/src/frame/frame_compare.cpp
index 5d085ef..e000f9f 100644
--- a/src/frame/frame_compare.cpp
+++ b/src/frame/frame_compare.cpp
@@ -145,6 +145,7 @@ Frame_Compare::~Frame_Compare(void)
 
 int Frame_Compare::run()
 {
+    Frame_Base::run();
     switch(_update_flag)
     {
         case 1:
diff --git a/src/frame/frame_factorytest.cpp b/src/frame/frame_factorytest.cpp
index 29bf5d4..98aa86e 100644
--- a/src/frame/frame_factorytest.cpp
+++ b/src/frame/frame_factorytest.cpp
@@ -234,6 +234,7 @@ void Frame_FactoryTest::scan(String *ssid, int32_t *rssi)
 
 int Frame_FactoryTest::run()
 {
+    Frame_Base::run();
     uint16_t pass_flag = _pass_flag;
     char buf[100];
     // POS
diff --git a/src/frame/frame_fileindex.cpp b/src/frame/frame_fileindex.cpp
index c73fd6c..e755206 100644
--- a/src/frame/frame_fileindex.cpp
+++ b/src/frame/frame_fileindex.cpp
@@ -166,7 +166,7 @@ void Frame_FileIndex::listDir(fs::FS &fs, const char *dirname)
         btn->CanvasNormal()->setTextDatum(CR_DATUM);
 
         String suffix = filename.substring(filename.lastIndexOf("."));
-        if(suffix.indexOf("txt") >= 0)
+        if (suffix.indexOf("txt") >= 0 || suffix.indexOf("TXT") >= 0)
         {
             btn->CanvasNormal()->pushImage(15, 14, 32, 32, ImageResource_item_icon_file_text_32x32);
             btn->AddArgs(EPDGUI_Button::EVENT_RELEASED, 0, btn);
diff --git a/src/frame/frame_keyboard.cpp b/src/frame/frame_keyboard.cpp
index c97f46f..55bd4da 100644
--- a/src/frame/frame_keyboard.cpp
+++ b/src/frame/frame_keyboard.cpp
@@ -142,6 +142,7 @@ int Frame_Keyboard::init(epdgui_args_vector_t &args)
 
 int Frame_Keyboard::run(void)
 {
+    Frame_Base::run();
     inputbox->AddText(keyboard->getData());
     return 1;
 }
diff --git a/src/frame/frame_lifegame.cpp b/src/frame/frame_lifegame.cpp
index 97f8502..db065a9 100644
--- a/src/frame/frame_lifegame.cpp
+++ b/src/frame/frame_lifegame.cpp
@@ -171,9 +171,11 @@ void LifeGame_NextGen(void *pvParameters)
 
 int Frame_Lifegame::run()
 {
+    Frame_Base::run();
     M5.update();
     if(M5.BtnP.wasReleased())
     {
+        EPDGUI_UpdateGlobalLastActiveTime();
         LifeGame_RandomCell();
     }
     xTaskCreatePinnedToCore(LifeGame_NextGen, "LifeGame_NextGen", 4096, NULL, 1, NULL, 0);
diff --git a/src/frame/frame_main.cpp b/src/frame/frame_main.cpp
index f75b420..d4648d8 100644
--- a/src/frame/frame_main.cpp
+++ b/src/frame/frame_main.cpp
@@ -326,6 +326,7 @@ int Frame_Main::init(epdgui_args_vector_t &args)
 
 int Frame_Main::run()
 {
+    Frame_Base::run();
     StatusBar(UPDATE_MODE_GL16);
     return 1;
 }
\ No newline at end of file
diff --git a/src/frame/frame_pictureviewer.cpp b/src/frame/frame_pictureviewer.cpp
index d0cadac..ad2cabb 100644
--- a/src/frame/frame_pictureviewer.cpp
+++ b/src/frame/frame_pictureviewer.cpp
@@ -54,6 +54,7 @@ void Frame_PictureViewer::err(String info)
 
 int Frame_PictureViewer::run()
 {
+    Frame_Base::run();
     if(_is_first)
     {
         _is_first = false;
diff --git a/src/frame/frame_setting.cpp b/src/frame/frame_setting.cpp
index 0c1d0d4..9025e70 100644
--- a/src/frame/frame_setting.cpp
+++ b/src/frame/frame_setting.cpp
@@ -9,16 +9,7 @@ const uint16_t kTimeZoneY = 520;
 
 void key_shutdown_cb(epdgui_args_vector_t &args)
 {
-    M5.EPD.WriteFullGram4bpp(GetWallpaper());
-    M5.EPD.UpdateFull(UPDATE_MODE_GC16);
-    M5.EPD.UpdateFull(UPDATE_MODE_GC16);
-    SaveSetting();
-    delay(600);
-    M5.disableEPDPower();
-    M5.disableEXTPower();
-    M5.disableMainPower();
-    esp_deep_sleep_start();
-    while(1);
+    Shutdown();
 }
 
 void key_restart_cb(epdgui_args_vector_t &args)
diff --git a/src/frame/frame_txtreader.cpp b/src/frame/frame_txtreader.cpp
index e3268aa..6c919db 100644
--- a/src/frame/frame_txtreader.cpp
+++ b/src/frame/frame_txtreader.cpp
@@ -88,6 +88,7 @@ uint32_t Frame_txtReader::renderText(uint32_t cursor, uint32_t length, M5EPD_Can
 
 int Frame_txtReader::run()
 {
+    Frame_Base::run();
     if(_is_first)
     {
         LoadingAnime_32x32_Start(254, 500);
@@ -123,6 +124,7 @@ int Frame_txtReader::run()
         M5.update();
         if(M5.BtnR.wasReleased() || (_key_operation == 1))
         {
+            EPDGUI_UpdateGlobalLastActiveTime();
             _key_operation = 0;
             if(_page != _page_end)
             {
@@ -156,6 +158,7 @@ int Frame_txtReader::run()
         }
         else if(M5.BtnL.wasReleased() || (_key_operation == -1))
         {
+            EPDGUI_UpdateGlobalLastActiveTime();
             _key_operation = 0;
             if(_page > 0)
             {
diff --git a/src/frame/frame_wifipassword.cpp b/src/frame/frame_wifipassword.cpp
index 45441fa..4b228e3 100644
--- a/src/frame/frame_wifipassword.cpp
+++ b/src/frame/frame_wifipassword.cpp
@@ -82,6 +82,7 @@ int Frame_WifiPassword::init(epdgui_args_vector_t &args)
 
 int Frame_WifiPassword::run(void)
 {
+    Frame_Base::run();
     String data = keyboard->getData();
     if(data.indexOf("\n") >= 0)
     {
diff --git a/src/frame/frame_wifiscan.cpp b/src/frame/frame_wifiscan.cpp
index 985da75..897e53d 100644
--- a/src/frame/frame_wifiscan.cpp
+++ b/src/frame/frame_wifiscan.cpp
@@ -114,6 +114,7 @@ void Frame_WifiScan::DrawItem(EPDGUI_Button *btn, String ssid, int rssi)
 
 int Frame_WifiScan::run()
 {
+    Frame_Base::run();
     if(_connect)
     {
         _connect = false;
diff --git a/src/global_setting.cpp b/src/global_setting.cpp
index 4117f69..c82e46a 100644
--- a/src/global_setting.cpp
+++ b/src/global_setting.cpp
@@ -313,3 +313,18 @@ void LoadingAnime_32x32_Stop()
     xSemaphoreGive(_xSemaphore_LoadingAnime);
     delay(200);
 }
+
+void Shutdown()
+{
+    log_d("Now the system is shutting down.");
+    M5.EPD.WriteFullGram4bpp(GetWallpaper());
+    M5.EPD.UpdateFull(UPDATE_MODE_GC16);
+    M5.EPD.UpdateFull(UPDATE_MODE_GC16);
+    SaveSetting();
+    delay(600);
+    M5.disableEPDPower();
+    M5.disableEXTPower();
+    M5.disableMainPower();
+    esp_deep_sleep_start();
+    while(1);
+}
\ No newline at end of file
diff --git a/src/global_setting.h b/src/global_setting.h
index cbf12cd..2b8bc08 100644
--- a/src/global_setting.h
+++ b/src/global_setting.h
@@ -7,6 +7,16 @@
 
 #define WALLPAPER_NUM 3
 
+// 是否开启自动关机省电
+#define ENABLE_AUTO_POWER_SAVE true
+
+// 1分钟提醒即将关机
+static const uint32_t TIME_BEFORE_SHUTDOWN_PROMPT_MS = 60 * 1000;
+// 显示10秒钟的关机提示
+static const uint32_t SHUTDOWN_PROMPT_DELAY_MS = 10 * 1000;
+// 最终关机时间
+static const uint32_t TIME_BEFORE_SHUTDOWN_MS = TIME_BEFORE_SHUTDOWN_PROMPT_MS + SHUTDOWN_PROMPT_DELAY_MS;
+
 enum
 {
     LANGUAGE_EN = 0,    // default, English
@@ -45,5 +55,6 @@ void SetTTFLoaded(uint8_t val);
 uint8_t isTTFLoaded(void);
 void SetInitStatus(uint8_t idx, uint8_t val);
 uint8_t GetInitStatus(uint8_t idx);
+void Shutdown();
 
 #endif //_GLOBAL_SETTING_H_
\ No newline at end of file