diff --git a/convert_mp3_to_flac/install_ffmpeg.bat b/convert_mp3_to_flac/install_ffmpeg.bat
new file mode 100644
index 0000000..346f1f4
--- /dev/null
+++ b/convert_mp3_to_flac/install_ffmpeg.bat
@@ -0,0 +1,31 @@
+@echo off
+chcp 65001 >nul
+
+echo =====================================
+echo   Windows FFmpeg 自动安装脚本
+echo =====================================
+
+:: 设置下载地址（gyan.dev 提供稳定构建）
+set URL=https://www.gyan.dev/ffmpeg/builds/ffmpeg-release-essentials.zip
+set ZIP=ffmpeg.zip
+set DEST=C:\ffmpeg
+
+echo.
+echo 下载 FFmpeg...
+powershell -Command "Invoke-WebRequest -Uri %URL% -OutFile %ZIP%"
+
+echo.
+echo 解压到 %DEST% ...
+powershell -Command "Expand-Archive -Path %ZIP% -DestinationPath %DEST% -Force"
+
+echo.
+echo 配置环境变量 PATH ...
+setx /M PATH "%DEST%\bin;%PATH%"
+
+echo.
+echo 清理临时文件 ...
+del %ZIP%
+
+echo.
+echo 安装完成，请重新打开命令提示符后输入: ffmpeg -version
+pause
diff --git a/convert_mp3_to_flac/install_ffmpeg.sh b/convert_mp3_to_flac/install_ffmpeg.sh
new file mode 100644
index 0000000..253dbde
--- /dev/null
+++ b/convert_mp3_to_flac/install_ffmpeg.sh
@@ -0,0 +1,39 @@
+#!/bin/bash
+set -e
+
+echo "=============================="
+echo "   FFmpeg 跨平台安装脚本"
+echo "=============================="
+echo
+
+OS=$(uname -s)
+
+if [[ "$OS" == "Darwin" ]]; then
+    echo "检测到 macOS 系统"
+    if ! command -v brew &>/dev/null; then
+        echo "未检测到 Homebrew，正在安装..."
+        /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
+    fi
+    echo "使用 Homebrew 安装 FFmpeg..."
+    brew install ffmpeg
+elif [[ "$OS" == "Linux" ]]; then
+    echo "检测到 Linux 系统"
+    if command -v apt &>/dev/null; then
+        sudo apt update
+        sudo apt install -y ffmpeg
+    elif command -v dnf &>/dev/null; then
+        sudo dnf install -y ffmpeg
+    elif command -v pacman &>/dev/null; then
+        sudo pacman -S --noconfirm ffmpeg
+    else
+        echo "未检测到常见包管理器，请手动安装 FFmpeg。"
+        exit 1
+    fi
+else
+    echo "暂不支持的系统: $OS"
+    exit 1
+fi
+
+echo
+echo "安装完成，版本信息："
+ffmpeg -version | head -n 1