diff --git a/packages/core/src/cli/initConfig.ts b/packages/core/src/cli/initConfig.ts
index 11881f905..e21b75e0d 100644
--- a/packages/core/src/cli/initConfig.ts
+++ b/packages/core/src/cli/initConfig.ts
@@ -8,7 +8,7 @@ import type {
   RslibConfig,
 } from '../types';
 import { getAbsolutePath } from '../utils/helper';
-import { logger } from '../utils/logger';
+import { isDebugKey, logger } from '../utils/logger';
 import type { BuildOptions, CommonOptions } from './commands';
 import { onBeforeRestart } from './restart';
 
@@ -141,8 +141,11 @@ export async function initConfig(options: CommonOptions): Promise<{
 
   applyCliOptions(config, options, root);
 
-  logger.debug('Rslib config used to generate Rsbuild environments:');
-  logger.debug(`\n${util.inspect(config, { depth: null, colors: true })}`);
+  // only debug serialized rslib config when DEBUG=rslib
+  if (isDebugKey(['rslib'])) {
+    logger.debug('Rslib config used to generate Rsbuild environments:');
+    logger.debug(`\n${util.inspect(config, { depth: null, colors: true })}`);
+  }
 
   return {
     config,
diff --git a/packages/core/src/utils/logger.ts b/packages/core/src/utils/logger.ts
index 5814ffd04..2bb721bbb 100644
--- a/packages/core/src/utils/logger.ts
+++ b/packages/core/src/utils/logger.ts
@@ -15,15 +15,17 @@
 import { type Logger, logger } from 'rslog';
 import { color } from './color';
 
-export const isDebug = (): boolean => {
+export const isDebugKey = (keys: string[]): boolean => {
   if (!process.env.DEBUG) {
     return false;
   }
 
   const values = process.env.DEBUG.toLocaleLowerCase().split(',');
-  return ['rslib', 'rsbuild', 'rs*', 'rstack', '*'].some((key) =>
-    values.includes(key),
-  );
+  return keys.some((key) => values.includes(key));
+};
+
+export const isDebug = (): boolean => {
+  return isDebugKey(['rslib', 'rsbuild', 'rs*', 'rstack', '*']);
 };
 
 // setup the logger level
diff --git a/website/docs/en/guide/basic/configure-rslib.mdx b/website/docs/en/guide/basic/configure-rslib.mdx
index 03cd8d0a2..34b3cc62a 100644
--- a/website/docs/en/guide/basic/configure-rslib.mdx
+++ b/website/docs/en/guide/basic/configure-rslib.mdx
@@ -228,5 +228,5 @@ Inspect config succeed, open following files to view the content:
 - Open the generated `/dist/.rsbuild/rspack.config.esm.mjs` file to see the complete content of the Rspack config.
 
 ::: info
-If you want to view the normalized Rslib configuration, you need to run [rslib inspect](/guide/basic/cli#rslib-inspect) command.
+If you want to view the normalized Rslib configuration, you can add the `DEBUG=rslib` environment variable when building or run the [rslib inspect](/guide/basic/cli#rslib-inspect) command.
 :::
diff --git a/website/docs/zh/guide/basic/configure-rslib.mdx b/website/docs/zh/guide/basic/configure-rslib.mdx
index a4fb6bc3a..6a377af3a 100644
--- a/website/docs/zh/guide/basic/configure-rslib.mdx
+++ b/website/docs/zh/guide/basic/configure-rslib.mdx
@@ -228,5 +228,5 @@ Inspect config succeed, open following files to view the content:
 - 打开生成的 `/dist/.rsbuild/rspack.config.esm.mjs` 文件，即可查看 Rspack 配置的完整内容。
 
 ::: info
-如果你想查看归一化后的 Rslib 配置，需要运行 [rslib inspect](/guide/basic/cli#rslib-inspect) 命令。
+如果你想查看归一化后的 Rslib 配置，可以在执行构建时添加 `DEBUG=rslib` 环境变量或运行 [rslib inspect](/guide/basic/cli#rslib-inspect) 命令。
 :::