diff --git a/src/contributes/commandsBase.ts b/src/contributes/commandsBase.ts
index cd119d7..7ffe9f7 100644
--- a/src/contributes/commandsBase.ts
+++ b/src/contributes/commandsBase.ts
@@ -28,6 +28,23 @@ export function checkDevChatDependency(): boolean {
 	}
 }
 
+export function getValidPythonCommand(): string | undefined {
+	try {
+		runCommand('python3 -V');
+		return 'python3';
+	} catch (error) {
+		try {
+			const version = runCommand('python -V');
+			if (version.includes('Python 3')) {
+				return 'python';
+			}
+			return undefined;
+		} catch (error) {
+			return undefined;
+		}
+	}
+}
+
 export function getPipxEnvironmentPath(): string | null {
 	// Get pipx environment
 	const pipxEnvOutput = runCommand('python3 -m pipx environment').toString();
diff --git a/src/panel/statusBarViewBase.ts b/src/panel/statusBarViewBase.ts
index b38d382..ef4a260 100644
--- a/src/panel/statusBarViewBase.ts
+++ b/src/panel/statusBarViewBase.ts
@@ -4,7 +4,7 @@ import { logger } from "../util/logger";
 
 import { UiUtilWrapper } from "../util/uiUtil";
 import { TopicManager } from "../topic/topicManager";
-import { checkDevChatDependency } from "../contributes/commandsBase";
+import { checkDevChatDependency, getValidPythonCommand } from "../contributes/commandsBase";
 import { ApiKeyManager } from '../util/apiKey';
 
 
@@ -37,7 +37,7 @@ export async function dependencyCheck(): Promise<[string, string]> {
 	// 1. not in a folder
 	// 2. dependence is invalid
 	// 3. ready
-	if (devchatStatus === '' || devchatStatus === 'waiting install devchat') {
+	if (devchatStatus === '' || devchatStatus === 'Waiting for devchat installation to complete') {
 		let bOk = true;
 		let devChat: string | undefined = UiUtilWrapper.getConfiguration('DevChat', 'DevChatPath');
 		if (!devChat) {
@@ -60,20 +60,30 @@ export async function dependencyCheck(): Promise<[string, string]> {
 			}
 		}
 	}
-	if (devchatStatus === 'not ready') {
+	if (devchatStatus === 'not ready' || devchatStatus === 'Waiting for Python3 installation to complete') {
 		// auto install devchat
-		UiUtilWrapper.runTerminal('DevChat Install', `python3 ${UiUtilWrapper.extensionPath() + "/tools/install.py"}`);
-		devchatStatus = 'waiting install devchat';
-		isVersionChangeCompare = true;
+		// check whether python3 exist
+		const pythonCommand = getValidPythonCommand();
+		if (!pythonCommand && devchatStatus === 'not ready') {
+			UiUtilWrapper.showErrorMessage('Python3 not found.');
+			devchatStatus = 'Waiting for Python3 installation to complete';
+			isVersionChangeCompare = true;
+		} else if (!pythonCommand) {
+			// Waiting for Python3 installation to complete
+		} else {
+			UiUtilWrapper.runTerminal('DevChat Install', `${pythonCommand} ${UiUtilWrapper.extensionPath() + "/tools/install.py"}`);
+			devchatStatus = 'Waiting for devchat installation to complete';
+			isVersionChangeCompare = true;
+		}
 	}
 
 	// check api key
-	if (apiKeyStatus === '' || apiKeyStatus === 'please set api key') {
+	if (apiKeyStatus === '' || apiKeyStatus === 'Please set the API key') {
 		const bOk = await ApiKeyManager.getApiKey();
 		if (bOk) {
 			apiKeyStatus = 'ready';
 		} else {
-			apiKeyStatus = 'please set api key';
+			apiKeyStatus = 'Please set the API key';
 		}
 	}
 
diff --git a/tools/install.py b/tools/install.py
index 9ecdff0..d6b5c49 100644
--- a/tools/install.py
+++ b/tools/install.py
@@ -2,6 +2,10 @@ import os
 import subprocess
 import sys
 
+# replace python3 with sys.executable, we will do everything in the same envrionment
+pythonCommand = sys.executable
+
+
 def check_pipx_installed():
     try:
         subprocess.run(["pipx", "--version"], check=True)
@@ -12,7 +16,7 @@ def check_pipx_installed():
 def install_pipx():
     print("Installing pipx...")
     try:
-        subprocess.run(["python3", "-m", "pip", "install", "pipx", "--force"], check=True)
+        subprocess.run([pythonCommand, "-m", "pip", "install", "pipx", "--force"], check=True)
         print("pipx installed successfully.")
     except subprocess.CalledProcessError as e:
         print("Error installing pipx:", e, file=sys.stderr)
@@ -20,8 +24,8 @@ def install_pipx():
 
 def add_pipx_to_path():
     print("Adding pipx to PATH...")
-    subprocess.run(["python3", "-m", "pipx", "ensurepath"], check=True)
-    result = subprocess.run(["python3", "-m", "pipx", "environment"], check=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
+    subprocess.run([pythonCommand, "-m", "pipx", "ensurepath"], check=True)
+    result = subprocess.run([pythonCommand, "-m", "pipx", "environment"], check=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
     pipx_path_line = [line for line in result.stdout.splitlines() if "PIPX_BIN_DIR" in line]
     if pipx_path_line:
         pipx_path = pipx_path_line[0].split('=')[-1].strip()