diff --git a/.eslintrc b/.eslintrc
index 497f082..7663fbf 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -22,7 +22,7 @@
   ],
   "rules": {
     "prettier/prettier": [
-      "error",
+      "warn",
       {
         "singleQuote": true,
         "semi": false,
diff --git a/e2e/playground/basic/docs/rpress.config.ts b/e2e/playground/basic/docs/rpress.config.ts
new file mode 100644
index 0000000..232e362
--- /dev/null
+++ b/e2e/playground/basic/docs/rpress.config.ts
@@ -0,0 +1,5 @@
+import { defineConfig } from 'r-press/dist'
+export default defineConfig({
+  title: 'RPress',
+  description: 'RPress Playground',
+})
diff --git a/e2e/playground/basic/package.json b/e2e/playground/basic/package.json
index eb72c85..8f85bbf 100644
--- a/e2e/playground/basic/package.json
+++ b/e2e/playground/basic/package.json
@@ -1,5 +1,6 @@
 {
   "name": "basic",
+  "type": "module",
   "scripts": {
     "dev": "r-press dev docs",
     "build": "r-press build docs"
diff --git a/src/node/cli.ts b/src/node/cli.ts
index 9dd2dcc..eab2410 100644
--- a/src/node/cli.ts
+++ b/src/node/cli.ts
@@ -3,6 +3,7 @@ import { createDevServer } from './dev'
 import { build } from './build'
 
 import { version } from '../../package.json'
+import { resolveConfig } from './config'
 
 const cli = cac('r-press').version(version).help()
 
@@ -10,6 +11,7 @@ cli
   .command('[root]', 'start dev server')
   .alias('dev')
   .action(async (root: string) => {
+    await resolveConfig(root, 'serve', 'development')
     const server = await createDevServer(root)
     await server.listen()
     server.printUrls()
@@ -18,6 +20,7 @@ cli
 cli
   .command('build [root]', 'build for production')
   .action(async (root: string) => {
+    await resolveConfig(root, 'build', 'production')
     await build(root)
   })
 
diff --git a/src/node/config.ts b/src/node/config.ts
new file mode 100644
index 0000000..9a5c67e
--- /dev/null
+++ b/src/node/config.ts
@@ -0,0 +1,73 @@
+import path from 'path'
+import fs from 'fs-extra'
+import { loadConfigFromFile } from 'vite'
+import type { SiteConfig, UserConfig } from '../shared/types'
+
+type RawUserConfig =
+  | UserConfig
+  | Promise<UserConfig>
+  | (() => UserConfig | Promise<UserConfig>)
+
+export async function resolveConfig(
+  root: string,
+  command: 'serve' | 'build',
+  mode: 'development' | 'production'
+): Promise<SiteConfig> {
+  const [configPath, userConfig] = await resolveUserConfig(root, command, mode)
+  const siteConfig: SiteConfig = {
+    root,
+    configPath: configPath,
+    siteData: resolveSiteData(userConfig as UserConfig),
+  }
+  console.log(siteConfig, 'siteConfig')
+  return siteConfig
+}
+
+export async function resolveUserConfig(
+  root: string,
+  command: 'serve' | 'build',
+  mode: 'development' | 'production'
+) {
+  // 1. 获取配置路径 支持js 和 ts 格式
+  const configPath = getUserConfigPath(root)
+  // 2.解析配置文件
+  const { config: rawConfig = {} as RawUserConfig } = await loadConfigFromFile(
+    {
+      command,
+      mode,
+    },
+    configPath,
+    root
+  )
+  if (rawConfig) {
+    const config =
+      typeof rawConfig === 'function' ? await rawConfig() : rawConfig
+    return [configPath, config] as const
+  }
+  return [configPath, {} as UserConfig] as const
+}
+
+export function resolveSiteData(userConfig: UserConfig): UserConfig {
+  return {
+    title: userConfig.title || 'Rpress.js',
+    description: userConfig.description || 'SSG Framework',
+    themeConfig: userConfig.themeConfig || {},
+    vite: userConfig.vite || {},
+  }
+}
+
+function getUserConfigPath(root: string) {
+  const configFileNames = ['rpress.config.ts', 'rpress.config.js']
+  try {
+    const configPath = configFileNames
+      .map((name) => path.resolve(root, name))
+      .find(fs.pathExistsSync)
+    return configPath
+  } catch (e) {
+    console.error('Failed to load config file.', e)
+    throw e
+  }
+}
+export function defineConfig(config: UserConfig): UserConfig {
+  return config
+}
diff --git a/src/node/index.ts b/src/node/index.ts
new file mode 100644
index 0000000..0f82c41
--- /dev/null
+++ b/src/node/index.ts
@@ -0,0 +1 @@
+export { defineConfig } from './config'
diff --git a/src/shared/types/index.ts b/src/shared/types/index.ts
new file mode 100644
index 0000000..98a6f7c
--- /dev/null
+++ b/src/shared/types/index.ts
@@ -0,0 +1,42 @@
+import type { UserConfig as ViteUserConfig } from 'vite'
+
+// 用户配置的超集
+export interface SiteConfig {
+  root: string
+  configPath: string
+  siteData: UserConfig
+}
+
+export interface UserConfig {
+  title?: string
+  description?: string
+  themeConfig?: ThemeConfig
+  vite?: ViteUserConfig
+}
+
+// 主题配置：导航栏 侧边栏
+export interface ThemeConfig {
+  nav?: NavItemWithLink[]
+  sidebar?: Sidebar
+  footer?: Footer
+}
+
+type NavItemWithLink = {
+  text: string
+  link: string
+}
+export interface Sidebar {
+  [path: string]: SidebarGroup[]
+}
+export interface Footer {
+  message: string
+}
+
+export interface SidebarGroup {
+  text: string
+  items: SidebarItem[]
+}
+type SidebarItem = {
+  text: string
+  link: string
+}
diff --git a/tsup.config.ts b/tsup.config.ts
index fd8a7de..ef0c80c 100644
--- a/tsup.config.ts
+++ b/tsup.config.ts
@@ -1,7 +1,7 @@
 import { defineConfig } from 'tsup'
 
 export default defineConfig({
-  entryPoints: ['src/node/cli.ts'],
+  entryPoints: ['src/node/cli.ts', 'src/node/index.ts'],
   bundle: true,
   splitting: true,
   outDir: 'dist',