diff --git a/script/docker-install.sh b/script/docker-install.sh
index f3bd5e4..d9a6017 100644
--- a/script/docker-install.sh
+++ b/script/docker-install.sh
@@ -2,59 +2,91 @@
 
 set -e
 
-#################################################################
-# 国内安装（使用阿里云镜像）
-install_docker_cn() {
+detect_distro() {
+    if [ ! -f /etc/os-release ]; then
+        echo "[ERROR] 未检测到 /etc/os-release，无法识别系统"
+        exit 1
+    fi
+
+    . /etc/os-release
+
+    case "${ID:-}" in
+    debian | ubuntu)
+        DISTRO="${ID}"
+        CODENAME="${UBUNTU_CODENAME:-${VERSION_CODENAME:-$(lsb_release -cs 2>/dev/null)}}"
+        ;;
+    *)
+        echo "[ERROR] 不支持的操作系统: ${ID:-未知}，仅支持 Debian 和 Ubuntu"
+        exit 1
+        ;;
+    esac
+
+    if [ -z "$CODENAME" ]; then
+        echo "[ERROR] 无法确定系统代号"
+        exit 1
+    fi
+}
+
+remove_conflicting_packages() {
     for pkg in docker.io docker-doc docker-compose podman-docker containerd runc; do
         sudo apt-get remove -y $pkg 2>/dev/null || true
     done
+}
 
+install_prerequisites() {
     sudo apt-get update
-    sudo apt-get install -y ca-certificates curl gnupg
+    sudo apt-get install -y ca-certificates curl gnupg lsb-release
+}
+
+#################################################################
+# 国内安装（使用清华镜像）
+install_docker_cn() {
+    local repo_base="https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/${DISTRO}"
+    local keyring="/usr/share/keyrings/docker-archive-keyring.gpg"
 
     sudo install -m 0755 -d /etc/apt/keyrings
-    curl -fsSL https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/debian/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
+    curl -fsSL "${repo_base}/gpg" | sudo gpg --dearmor -o "${keyring}"
 
-    echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/debian \
-    $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list >/dev/null
+    echo "deb [arch=$(dpkg --print-architecture) signed-by=${keyring}] ${repo_base} \
+    ${CODENAME} stable" | sudo tee /etc/apt/sources.list.d/docker.list >/dev/null
 
     sudo apt-get update
     sudo apt-get install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
 
-    sudo usermod -aG docker $USER
+    sudo usermod -aG docker "$USER"
 }
 
 #################################################################
 # 国外安装（使用官方源）
 install_docker_intl() {
-    for pkg in docker.io docker-doc docker-compose podman-docker containerd runc; do
-        sudo apt-get remove -y $pkg 2>/dev/null || true
-    done
-
-    sudo apt-get update
-    sudo apt-get install -y ca-certificates curl gnupg
+    local repo_base="https://download.docker.com/linux/${DISTRO}"
+    local keyring="/etc/apt/keyrings/docker.asc"
 
     sudo install -m 0755 -d /etc/apt/keyrings
-    sudo curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc
-    sudo chmod a+r /etc/apt/keyrings/docker.asc
+    sudo curl -fsSL "${repo_base}/gpg" -o "${keyring}"
+    sudo chmod a+r "${keyring}"
 
     echo \
-        "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian \
-        $(. /etc/os-release && echo "$VERSION_CODENAME") stable" |
+        "deb [arch=$(dpkg --print-architecture) signed-by=${keyring}] ${repo_base} \
+        ${CODENAME} stable" |
         sudo tee /etc/apt/sources.list.d/docker.list >/dev/null
 
     sudo apt-get update
     sudo apt-get install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin
 
-    sudo usermod -aG docker $USER
+    sudo usermod -aG docker "$USER"
 }
 
+detect_distro
+remove_conflicting_packages
+install_prerequisites
+
 # 根据环境变量选择安装方式（须在函数定义之后调用）
 if [ "$CN_REGION" = "1" ]; then
-    echo "[INFO] 国内环境，使用阿里云镜像安装 Docker"
+    echo "[INFO] 国内环境，使用清华镜像安装 Docker (${DISTRO}/${CODENAME})"
     install_docker_cn
 else
-    echo "[INFO] 国外环境，使用官方源安装 Docker"
+    echo "[INFO] 国外环境，使用官方源安装 Docker (${DISTRO}/${CODENAME})"
     install_docker_intl
 fi