diff --git a/src/util/python_installer/app_install.ts b/src/util/python_installer/app_install.ts
new file mode 100644
index 0000000..11bff89
--- /dev/null
+++ b/src/util/python_installer/app_install.ts
@@ -0,0 +1,60 @@
+/*
+ Install devchat
+ */
+
+import { logger } from "../logger";
+import { installConda } from "./conda_install";
+import { installPackage } from "./package_install";
+import { installPython } from "./python_install";
+
+// step 1. install conda
+// step 2. create env with python 3.11.4
+// step 3. install devchat in the env
+
+export async function appInstall(pkgName: string, pythonVersion: string) : Promise<string> {
+	// install conda
+	logger.channel()?.info('Install conda ...')
+	const condaCommand = await installConda();
+	if (!condaCommand) {
+		logger.channel()?.error('Install conda failed');
+		logger.channel()?.show();
+		return '';
+	}
+
+	// create env with specify python
+	logger.channel()?.info('Create env ...');
+	let pythonCommand = '';
+	// try 3 times
+	for (let i = 0; i < 3; i++) {
+		pythonCommand = await installPython(condaCommand, pkgName, pythonVersion);
+		if (pythonCommand) {
+			break;
+		}
+		logger.channel()?.info(`Create env failed, try again: ${i + 1}`);
+	}
+	if (!pythonCommand) {
+		logger.channel()?.error('Create env failed');
+		logger.channel()?.show();
+		return '';
+	}
+	logger.channel()?.info(`Create env success: ${pythonCommand}`);
+
+	// install devchat in the env
+	logger.channel()?.info('Install python packages ...')
+	let isInstalled = false;
+	// try 3 times
+	for (let i = 0; i < 3; i++) {
+		isInstalled = await installPackage(pythonCommand, pkgName);
+		if (isInstalled) {
+			break;
+		}
+		logger.channel()?.info(`Install packages failed, try again: ${i + 1}`);
+	}
+	if (!isInstalled) {
+		logger.channel()?.error('Install packages failed');
+		logger.channel()?.show();
+		return '';
+	}
+	
+	return pythonCommand;
+}
\ No newline at end of file
diff --git a/src/util/python_installer/conda_install.ts b/src/util/python_installer/conda_install.ts
new file mode 100644
index 0000000..a3c0e3b
--- /dev/null
+++ b/src/util/python_installer/conda_install.ts
@@ -0,0 +1,180 @@
+/*
+ Install conda command
+ Install file from https://repo.anaconda.com/miniconda/
+ */
+
+import { logger } from "../logger";
+import { getCondaDownloadUrl } from "./conda_url";
+import { downloadFile } from "./https_download";
+
+import { exec, spawn } from 'child_process';
+const fs = require('fs');
+const path = require('path');
+
+
+// Check whether conda has installed before installing conda.
+// If "conda -V" runs ok, then conda has installed.
+// If ~/.devchat/conda/bin/conda exists, then conda has installed.
+
+// is "conda -V" ok? then find conda command
+// is ~/.devchat/conda/bin/conda exists? then return ~/.devchat/conda/bin/conda
+// find conda command by: with different os use diffenc command: which conda | where conda
+async function isCondaInstalled(): Promise<string> {
+  // whether conda -V runs ok
+  const condaVersion = await runCommand('conda2 -V');
+  if (condaVersion) {
+    // find conda command by: with different os use diffenc command: which conda | where conda
+    const os = process.platform;
+    const command = os === 'win32' ? 'where conda' : 'which conda';
+    const condaCommand = await runCommand(command);
+    if (condaCommand) {
+      const condaCommandLines = condaCommand.split('\n');
+      return condaCommandLines[0].trim();
+    }
+  }
+
+  // whether ~/.devchat/conda/bin/conda exists
+  const os = process.platform;
+  const userHome = os === 'win32' ? fs.realpathSync(process.env.USERPROFILE || '') : process.env.HOME;
+  const pathToConda = `${userHome}/.devchat/conda`;
+  const condaPath = os === 'win32' ? `${pathToConda}/Scripts/conda.exe` : `${pathToConda}/bin/conda`;
+  logger.channel()?.info(`checking conda path: ${condaPath}`); 
+  const isCondaPathExists = fs.existsSync(condaPath);
+  if (isCondaPathExists) {
+    return condaPath;
+  }
+
+  logger.channel()?.info(`conda path: ${condaPath} not exists`); 
+  return '';
+}
+
+function runCommand(command: string): Promise<string> {
+  return new Promise((resolve, reject) => {
+    exec(command, (error, stdout, stderr) => {
+      if (error) {
+        resolve('');
+      } else {
+        resolve(stdout.trim());
+      }
+    });
+  });
+}
+
+function checkPathExists(path: string): Promise<boolean> {
+  return new Promise((resolve, reject) => {
+    exec(`test -e ${path}`, (error, stdout, stderr) => {
+      if (error) {
+        resolve(false);
+      } else {
+        resolve(true);
+      }
+    });
+  });
+}
+
+// install file is an exe file or sh file
+// according to different os, use different command to install conda, Installing in silent mode 
+// install conda to USER_HOME/.devchat/conda
+// return： conda command path
+async function installCondaByInstallFile(installFileUrl: string) : Promise<string> {
+    // Determine the operating system
+    const os = process.platform;
+    
+    // Set the installation directory for conda
+    const userHome = os === 'win32' ? fs.realpathSync(process.env.USERPROFILE || '') : process.env.HOME;
+    const pathToConda = `${userHome}/.devchat/conda`;
+    
+    // Define the command to install conda based on the operating system
+    let command = '';
+    if (os === 'win32') {
+        const winPathToConda = pathToConda.replace(/\//g, '\\');
+        command = `start /wait ${installFileUrl} /InstallationType=JustMe /AddToPath=0 /RegisterPython=0 /S /D=${winPathToConda}`;
+    } else if (os === 'linux') {
+        command = `bash ${installFileUrl} -b -p ${pathToConda}`;
+    } else if (os === 'darwin') {
+        command = `bash ${installFileUrl} -b -p ${pathToConda}`;
+    } else {
+        throw new Error('Unsupported operating system');
+    }
+    
+    // Execute the command to install conda
+    logger.channel()?.info(`install conda command: ${command}`);
+    try {
+        await executeCommand(command);
+    
+        // Return the path to the conda command
+        let condaCommandPath = '';
+        if (os === 'win32') {
+            condaCommandPath = `${pathToConda}\\Scripts\\conda.exe`;
+        } else {
+            condaCommandPath = `${pathToConda}/bin/conda`;
+        }
+        
+        return condaCommandPath;
+    } catch(error) {
+        logger.channel()?.error(`install conda failed: ${error}`);
+        logger.channel()?.show();
+        return '';
+    }
+}
+
+// Helper function to execute a command
+function executeCommand(command: string): Promise<void> {
+    return new Promise<void>((resolve, reject) => {
+        exec(command, (error, stdout, stderr) => {
+            if (error) {
+				logger.channel()?.error(`exec error: ${error}`);
+				logger.channel()?.show();
+                reject(error);
+            } else {
+                if (stderr) {
+					logger.channel()?.error(`stderr: ${error}`);
+					logger.channel()?.show();
+                }
+                if (stdout) {
+					logger.channel()?.info(`${stdout}`);
+                }
+                resolve();
+            }
+        });
+    });
+}
+
+export async function installConda() : Promise<string> {
+	// step 1. check whether conda has installed
+	// step 2. download install file
+	// step 3. install conda by install file
+	
+	const condaCommand = await isCondaInstalled();
+	if (condaCommand) {
+		logger.channel()?.info(`conda has installed: ${condaCommand}`);
+		return condaCommand;
+	}
+
+	const downloadInstallFile = getCondaDownloadUrl();
+	if (!downloadInstallFile) {
+		logger.channel()?.error(`get conda download url failed`);
+		logger.channel()?.show();
+		return '';
+	}
+
+	logger.channel()?.info(`conda download url: ${downloadInstallFile}`);
+	let installFileLocal = '';
+	// try 3 times
+	for (let i = 0; i < 3; i++) {
+		installFileLocal = await downloadFile(downloadInstallFile);
+		if (installFileLocal) {
+			break;
+		}
+		logger.channel()?.info(`download conda install file failed, try again ...`);
+	}
+	if (!installFileLocal) {
+		logger.channel()?.error(`download conda install file failed`);
+		logger.channel()?.show();
+		return '';
+	}
+
+	logger.channel()?.info(`conda install file: ${installFileLocal}`);
+	const installedConda = await installCondaByInstallFile(installFileLocal);
+	return installedConda;
+}
\ No newline at end of file
diff --git a/src/util/python_installer/conda_url.ts b/src/util/python_installer/conda_url.ts
new file mode 100644
index 0000000..be53383
--- /dev/null
+++ b/src/util/python_installer/conda_url.ts
@@ -0,0 +1,54 @@
+/*
+ Get conda download url
+ */
+
+ import os from 'os';
+import { logger } from '../logger';
+
+ function getDownloadFileName(): string {
+	const platform = os.platform();
+	const arch = os.arch();
+	logger.channel()?.info(`Platform: ${platform}, Arch: ${arch}`);
+
+	if (platform === "win32") {
+	  if (arch === "x64") {
+		return "Miniconda3-latest-Windows-x86_64.exe";
+	  } else if (arch === "ia32") {
+		return "Miniconda3-latest-Windows-x86.exe";
+	  } else {
+		return "Miniconda3-latest-Windows-x86_64.exe";
+	  }
+	} else if (platform === "darwin") {
+	  if (arch === "x64") {
+		return "Miniconda3-latest-MacOSX-x86_64.sh";
+	  } else if (arch === "arm64") {
+		return "Miniconda3-latest-MacOSX-arm64.sh";
+	  } else if (arch === "x86") {
+		return "Miniconda3-latest-MacOSX-x86.sh";
+	  } else {
+		return "Miniconda3-latest-MacOSX-arm64.sh";
+	  }
+	} else if (platform === "linux") {
+	  if (arch === "x64") {
+		return "Miniconda3-latest-Linux-x86_64.sh";
+	  } else if (arch === "s390x") {
+		return "Miniconda3-latest-Linux-s390x.sh";
+	  } else if (arch === "ppc64le") {
+		return "Miniconda3-latest-Linux-ppc64le.sh";
+	  } else if (arch === "aarch64") {
+		return "Miniconda3-latest-Linux-aarch64.sh";
+	  } else if (arch === "x86") {
+		return "Miniconda3-latest-Linux-x86.sh";
+	  } else if (arch === "armv7l") {
+		return "Miniconda3-latest-Linux-armv7l.sh";
+	  } else {
+		return "Miniconda3-latest-Linux-x86_64.sh";
+	  }
+	}
+  
+	return "";
+  }
+
+export function getCondaDownloadUrl(): string {
+	return 'https://repo.anaconda.com/miniconda/' + getDownloadFileName();
+}
\ No newline at end of file
diff --git a/src/util/python_installer/https_download.ts b/src/util/python_installer/https_download.ts
new file mode 100644
index 0000000..be86a54
--- /dev/null
+++ b/src/util/python_installer/https_download.ts
@@ -0,0 +1,47 @@
+import * as fs from 'fs';
+import * as https from 'https';
+import * as os from 'os';
+import * as path from 'path';
+import { logger } from '../logger';
+
+// download url to tmp directory
+// return: local file path or empty string
+export async function downloadFile(url: string): Promise<string> {
+	const os = process.platform;
+	const tempDir = os === 'win32' ? fs.realpathSync(process.env.USERPROFILE || '') : process.env.HOME;
+    
+  const fileName = path.basename(url); // 从 URL 中提取文件名称
+  const destination = path.join(tempDir!, fileName); // 构建文件路径
+
+  const file = fs.createWriteStream(destination);
+  let downloadedBytes = 0;
+  let totalBytes = 0;
+  let lastProgress = 0;
+
+  return new Promise<string>((resolve, reject) => {
+    https.get(url, (response) => {
+      totalBytes = parseInt(response.headers['content-length'] || '0', 10);
+
+      response.on('data', (chunk) => {
+        downloadedBytes += chunk.length;
+        const progress = (downloadedBytes / totalBytes) * 100;
+
+        if (progress - lastProgress >= 3) {
+          logger.channel()?.info(`Downloaded ${downloadedBytes} bytes (${progress.toFixed(2)}%)`);
+          lastProgress = progress;
+        }
+      });
+
+      response.pipe(file);
+
+      file.on('finish', () => {
+        file.close();
+        resolve(destination); // 修改为传递下载的文件路径
+      });
+    }).on('error', (error) => {
+      fs.unlink(destination, () => {
+        resolve(''); // 下载失败时返回空字符串
+      });
+    });
+  });
+}
\ No newline at end of file
diff --git a/src/util/python_installer/install_askcode.ts b/src/util/python_installer/install_askcode.ts
new file mode 100644
index 0000000..4ab64bb
--- /dev/null
+++ b/src/util/python_installer/install_askcode.ts
@@ -0,0 +1,29 @@
+/*
+ Install DevChat with python=3.11.4
+ */
+
+ import { logger } from "../logger";
+ import { appInstall } from "./app_install"
+ 
+ 
+ // python version: 3.11.4
+ // pkg name: devchat
+ // return: path to devchat, devchat is located in the same directory as python
+ export async function installAskCode(): Promise<string> {
+	 try {
+		 logger.channel()?.info(`start installing AskCode with python=3.11.4 ...`);
+		 const pythonCommand = await appInstall('devchat-ask', '3.11.4');
+		 if (!pythonCommand) {
+			 logger.channel()?.error(`failed to install devchat-ask with python=3.11.4`);
+			 logger.channel()?.show();
+			 return '';
+		 }
+ 
+		 logger.channel()?.info(`installed devchat-ask with python=3.11.4 at ${pythonCommand}`);
+		 return pythonCommand;
+	 } catch (error) {
+		 logger.channel()?.error(`${error}`);
+		 logger.channel()?.show();
+		 return '';
+	 }
+ }
\ No newline at end of file
diff --git a/src/util/python_installer/install_devchat.ts b/src/util/python_installer/install_devchat.ts
new file mode 100644
index 0000000..300356e
--- /dev/null
+++ b/src/util/python_installer/install_devchat.ts
@@ -0,0 +1,55 @@
+/*
+ Install DevChat with python=3.11.4
+ */
+
+import { logger } from "../logger";
+import { appInstall } from "./app_install"
+
+import * as path from 'path';
+import * as fs from 'fs';
+
+
+let isDevChatInstalling: boolean | undefined = undefined;
+
+export function isDevchatInstalling(): boolean {
+	if (isDevChatInstalling === true) {
+		return true;
+	}
+	return false;
+}
+
+// python version: 3.11.4
+// pkg name: devchat
+// return: path to devchat, devchat is located in the same directory as python
+export async function installDevchat(): Promise<string> {
+	try {
+		logger.channel()?.info(`start installing devchat with python=3.11.4 ...`);
+		isDevChatInstalling = true;
+		const pythonCommand = await appInstall('devchat', '3.11.4');
+		if (!pythonCommand) {
+			logger.channel()?.error(`failed to install devchat with python=3.11.4`);
+			logger.channel()?.show();
+			isDevChatInstalling = false;
+			return '';
+		}
+
+		// Get the directory of pythonCommand
+		const pythonDirectory = path.dirname(pythonCommand);
+
+		// Get the path of devchat
+		let devchatPath = path.join(pythonDirectory, 'devchat');
+
+		// Check if devchatPath exists, if not, try with 'Scripts' subdirectory
+		if (!fs.existsSync(devchatPath)) {
+			devchatPath = path.join(pythonDirectory, 'Scripts', 'devchat');
+		}
+
+		isDevChatInstalling = false;
+		return devchatPath;
+	} catch (error) {
+		logger.channel()?.error(`${error}`);
+		logger.channel()?.show();
+		isDevChatInstalling = false;
+		return '';
+	}
+}
\ No newline at end of file
diff --git a/src/util/python_installer/package_install.ts b/src/util/python_installer/package_install.ts
new file mode 100644
index 0000000..ca27435
--- /dev/null
+++ b/src/util/python_installer/package_install.ts
@@ -0,0 +1,41 @@
+/*
+ Install specific version of package. e.g. devchat
+ */
+
+
+import { spawn } from 'child_process';
+import { logger } from '../logger';
+
+// install specific version of package
+// pythonCommand -m install pkgName
+// if install success, return true
+// else return false
+export async function installPackage(pythonCommand: string, pkgName: string) : Promise<boolean> {
+    return new Promise((resolve, reject) => {
+        const cmd = pythonCommand;
+        const args = ['-m', 'pip', 'install', pkgName];
+        const child = spawn(cmd, args);
+
+        child.stdout.on('data', (data) => {
+			logger.channel()?.info(`${data}`);
+        });
+
+        child.stderr.on('data', (data) => {
+            console.error(`stderr: ${data}`);
+        });
+
+        child.on('error', (error) => {
+            logger.channel()?.error(`exec error: ${error}`);
+            logger.channel()?.show();
+            resolve(false);
+        });
+
+        child.on('close', (code) => {
+            if (code !== 0) {
+                resolve(false);
+            } else {
+                resolve(true);
+            }
+        });
+    });
+}
\ No newline at end of file
diff --git a/src/util/python_installer/python_install.ts b/src/util/python_installer/python_install.ts
new file mode 100644
index 0000000..5d2360c
--- /dev/null
+++ b/src/util/python_installer/python_install.ts
@@ -0,0 +1,83 @@
+import { exec, spawn } from 'child_process';
+import * as path from 'path';
+import * as os from 'os';
+import { logger } from '../logger';
+const fs = require('fs');
+
+// Check if the environment already exists
+export async function checkEnvExists(condaCommandPath: string, envName: string): Promise<boolean> {
+  return new Promise<boolean>((resolve, reject) => {
+    const condaCommand = path.resolve(condaCommandPath);
+    const command = `${condaCommand} env list`;
+    exec(command, (error, stdout, stderr) => {
+      if (error) {
+        logger.channel()?.error(`Error checking environments`);
+        logger.channel()?.show();
+        reject(false);
+      } else {
+        const envs = stdout.split('\n').map(line => line.split(' ')[0]);
+        resolve(envs.includes(envName));
+      }
+    });
+  });
+}
+
+// Install env with specific python version
+// conda create -n {envName} python={pythonVersion} --yes
+// return: python in env path
+export async function installPython(condaCommandPath: string, envName: string, pythonVersion: string): Promise<string> {
+  const envExists = await checkEnvExists(condaCommandPath, envName);
+  
+  const condaCommand = path.resolve(condaCommandPath);
+  const envPath = path.resolve(condaCommand, '..', '..', 'envs', envName);
+  let pythonPath;
+  let pythonPath2;
+  if (os.platform() === 'win32') {
+    pythonPath = path.join(envPath, 'Scripts', 'python.exe');
+	pythonPath2 = path.join(envPath, 'python.exe');
+  } else {
+    pythonPath = path.join(envPath, 'bin', 'python');
+  }
+
+  if (envExists) {
+	if (fs.existsSync(pythonPath)) {
+		return pythonPath;
+	} else if (pythonPath2 && fs.existsSync(pythonPath2)) {
+		return pythonPath2;
+	}
+  }
+
+  return new Promise<string>((resolve, reject) => {
+    const cmd = condaCommand;
+    const args = ['create', '-n', envName, `python=${pythonVersion}`, '--yes'];
+    const child = spawn(cmd, args);
+
+    child.stdout.on('data', (data) => {
+		logger.channel()?.info(`${data}`);
+    });
+
+    child.stderr.on('data', (data) => {
+      console.error(`stderr: ${data}`);
+    });
+
+    child.on('error', (error) => {
+      logger.channel()?.error(`Error installing python ${pythonVersion} in env ${envName}`);
+      logger.channel()?.show();
+      reject('');
+    });
+
+    child.on('close', (code) => {
+      if (code !== 0) {
+        reject(new Error(`Command exited with code ${code}`));
+      } else {
+		if (fs.existsSync(pythonPath)) {
+			resolve(pythonPath);
+		} else if (pythonPath2 && fs.existsSync(pythonPath2)) {
+			resolve(pythonPath2);
+		} else {
+			reject(new Error(`No Python found`));
+		}
+      }
+    });
+  });
+}
\ No newline at end of file
diff --git a/src/util/python_installer/readme.md b/src/util/python_installer/readme.md
new file mode 100644
index 0000000..bf3dcfa
--- /dev/null
+++ b/src/util/python_installer/readme.md
@@ -0,0 +1,12 @@
+# Why conda?
+Devchat-vscode support custom extension. Different extension may need different python version.
+
+pyenv is also a python version manager, but it always download source of python, then build it to binary.
+
+conda is a package manager, it can download binary of python, and install packages.
+
+# Where to install?
+Install conda to $USER_PROFILE/.devchat
+
+Python will install inside $USER_PROFILE/.devchat/conda.
+