diff --git a/src-python/config.py b/src-python/config.py
index e5ac086e..2aa8ac28 100644
--- a/src-python/config.py
+++ b/src-python/config.py
@@ -109,6 +109,14 @@ class Config:
     def MAX_SPEAKER_THRESHOLD(self):
         return self._MAX_SPEAKER_THRESHOLD
 
+    @property
+    def WATCHDOG_TIMEOUT(self):
+        return self._WATCHDOG_TIMEOUT
+
+    @property
+    def WATCHDOG_INTERVAL(self):
+        return self._WATCHDOG_INTERVAL
+
     # Read Write
     @property
     def ENABLE_SPEAKER2CHATBOX(self):
@@ -993,6 +1001,8 @@ class Config:
 
         self._MAX_MIC_THRESHOLD = 2000
         self._MAX_SPEAKER_THRESHOLD = 4000
+        self._WATCHDOG_TIMEOUT = 60
+        self._WATCHDOG_INTERVAL = 20
 
         # Read Write
         self._ENABLE_TRANSLATION = False
diff --git a/src-python/model.py b/src-python/model.py
index d2ed7d70..fa22b622 100644
--- a/src-python/model.py
+++ b/src-python/model.py
@@ -31,6 +31,7 @@ from models.translation.translation_utils import checkCTranslate2Weight, downloa
 from models.transcription.transcription_whisper import checkWhisperWeight, downloadWhisperWeight
 from models.overlay.overlay import Overlay
 from models.overlay.overlay_image import OverlayImage
+from models.watchdog.watchdog import Watchdog
 
 class threadFnc(Thread):
     def __init__(self, fnc, end_fnc=None, daemon=True, *args, **kwargs):
@@ -102,6 +103,7 @@ class Model:
         self.mic_mute_status = None
         self.mic_mute_status_check = None
         self.kks = kakasi()
+        self.watchdog = Watchdog(config.WATCHDOG_TIMEOUT, config.WATCHDOG_INTERVAL)
 
     def checkCTranslatorCTranslate2ModelWeight(self):
         return checkCTranslate2Weight(config.PATH_LOCAL, config.CTRANSLATE2_WEIGHT_TYPE)
@@ -723,4 +725,21 @@ class Model:
     def shutdownOverlay(self):
         self.overlay.shutdownOverlay()
 
+    def startWatchdog(self):
+        self.th_watchdog = threadFnc(self.watchdog.start)
+        self.th_watchdog.daemon = True
+        self.th_watchdog.start()
+
+    def feedWatchdog(self):
+        self.watchdog.feed()
+
+    def setWatchdogCallback(self, callback):
+        self.watchdog.setCallback(callback)
+
+    def stopWatchdog(self):
+        if isinstance(self.th_watchdog, threadFnc):
+            self.th_watchdog.stop()
+            self.th_watchdog.join()
+            self.th_watchdog = None
+
 model = Model()
\ No newline at end of file
diff --git a/src-python/models/watchdog/watchdog.py b/src-python/models/watchdog/watchdog.py
new file mode 100644
index 00000000..089e8680
--- /dev/null
+++ b/src-python/models/watchdog/watchdog.py
@@ -0,0 +1,22 @@
+from typing import Callable
+import time
+from utils import printLog
+
+class Watchdog:
+    def __init__(self, timeout:int=60, interval:int=20):
+        self.timeout = timeout
+        self.interval = interval
+        self.last_feed_time = time.time()
+
+    def feed(self):
+        self.last_feed_time = time.time()
+
+    def setCallback(self, callback):
+        self.callback = callback
+
+    def start(self):
+        if time.time() - self.last_feed_time > self.timeout:
+            printLog("Watchdog timeout! Shutting down...")
+            if isinstance(self.callback, Callable):
+                self.callback()
+        time.sleep(self.interval)
\ No newline at end of file
diff --git a/src-python/webui_controller.py b/src-python/webui_controller.py
index 387d34c8..6632e3a0 100644
--- a/src-python/webui_controller.py
+++ b/src-python/webui_controller.py
@@ -1535,6 +1535,25 @@ class Controller:
         th_download.daemon = True
         th_download.start()
 
+    @staticmethod
+    def startWatchdog(*args, **kwargs) -> dict:
+        model.startWatchdog()
+        return {"status":200, "result":True}
+
+    @staticmethod
+    def feedWatchdog(*args, **kwargs) -> dict:
+        model.feedWatchdog()
+        return {"status":200, "result":True}
+
+    @staticmethod
+    def setWatchdogCallback(callback) -> dict:
+        model.setWatchdogCallback(callback)
+
+    @staticmethod
+    def stopWatchdog(*args, **kwargs) -> dict:
+        model.stopWatchdog()
+        return {"status":200, "result":True}
+
     def init(self, *args, **kwargs) -> None:
         printLog("Start Initialization")
 
@@ -1598,4 +1617,6 @@ class Controller:
         if config.AUTO_SPEAKER_SELECT is True:
             self.setEnableAutoSpeakerSelect()
 
-        printLog("End Initialization")
\ No newline at end of file
+        printLog("End Initialization")
+
+        self.startWatchdog()
\ No newline at end of file
diff --git a/src-python/webui_mainloop.py b/src-python/webui_mainloop.py
index e61a3c17..7af0cd89 100644
--- a/src-python/webui_mainloop.py
+++ b/src-python/webui_mainloop.py
@@ -305,11 +305,16 @@ mapping = {
     "/set/data/osc_port": {"status": True, "variable":controller.setOscPort},
 
     "/run/open_filepath_config_file": {"status": True, "variable":controller.openFilepathConfigFile},
+
+    # "/run/start_watchdog": {"status": True, "variable":controller.startWatchdog},
+    "/run/feed_watchdog": {"status": True, "variable":controller.feedWatchdog},
+    # "/run/stop_watchdog": {"status": True, "variable":controller.stopWatchdog},
 }
 
 class Main:
     def __init__(self) -> None:
         self.queue = Queue()
+        self.main_loop = True
 
     def receiver(self) -> None:
         while True:
@@ -328,7 +333,7 @@ class Main:
         th_receiver.daemon = True
         th_receiver.start()
 
-    def handleRequest(self, endpoint, data=None):
+    def handleRequest(self, endpoint, data=None) -> tuple:
         handler = mapping.get(endpoint)
         if handler is None:
             response = "Invalid endpoint"
@@ -371,15 +376,19 @@ class Main:
         th_handler.daemon = True
         th_handler.start()
 
-    def loop(self) -> None:
-        while True:
+    def start(self) -> None:
+        while self.main_loop:
             time.sleep(1)
 
+    def stop(self) -> None:
+        self.main_loop = False
+
 if __name__ == "__main__":
     main = Main()
     main.startReceiver()
     main.startHandler()
 
+    controller.setWatchdogCallback(main.stop)
     controller.init()
 
     # mappingのすべてのstatusをTrueにする
@@ -389,7 +398,7 @@ if __name__ == "__main__":
     process = "main"
     match process:
         case "main":
-            main.loop()
+            main.start()
 
         case "test":
             for _ in range(100):
diff --git a/src-ui/app/App.jsx b/src-ui/app/App.jsx
index 8c8fb406..64e56bd7 100644
--- a/src-ui/app/App.jsx
+++ b/src-ui/app/App.jsx
@@ -91,6 +91,8 @@ const StartPythonFacadeComponent = () => {
     useEffect(() => {
         if (!hasRunRef.current) {
             asyncStartPython().then((result) => {
+                startFeedingToWatchDog();
+
                 getUiLanguage();
                 getUiScaling();
                 getMessageLogUiScaling();
@@ -245,4 +247,12 @@ const TransparencyController = () => {
     }, [currentTransparency.data]);
 
     return null;
+};
+
+import { useStdoutToPython } from "@logics/useStdoutToPython";
+const startFeedingToWatchDog = () => {
+    const { asyncStdoutToPython } = useStdoutToPython();
+    setInterval(() => {
+        asyncStdoutToPython("/run/feed_watchdog");
+    }, 20000); // 20000ミリ秒 = 20秒
 };
\ No newline at end of file
diff --git a/src-ui/logics/useReceiveRoutes.js b/src-ui/logics/useReceiveRoutes.js
index c2cabe2c..06887605 100644
--- a/src-ui/logics/useReceiveRoutes.js
+++ b/src-ui/logics/useReceiveRoutes.js
@@ -82,6 +82,7 @@ export const useReceiveRoutes = () => {
 
 
     const routes = {
+        "/run/feed_watchdog": () => {},
         // Main Page
         // Page Controls
         "/get/data/main_window_sidebar_compact_mode": updateIsMainPageCompactMode,