diff --git a/deploy.sh b/deploy.sh
index b10c0d4..d5dffdc 100755
--- a/deploy.sh
+++ b/deploy.sh
@@ -387,6 +387,47 @@ start_infrastructure() {
     log_success "基础设施启动完成"
 }
 
+# 初始化数据库 (自动检测并执行)
+init_database() {
+    log_step "检查数据库初始化状态..."
+
+    # 等待 PostgreSQL 完全就绪
+    sleep 3
+
+    # 检查 admins 表是否存在 (作为初始化完成的标志)
+    local table_exists
+    table_exists=$($DOCKER_COMPOSE exec -T postgres psql -U postgres -d iconsulting -tAc "SELECT EXISTS (SELECT FROM information_schema.tables WHERE table_name = 'admins');" 2>/dev/null)
+
+    if [ "$table_exists" = "t" ]; then
+        log_success "数据库已初始化，跳过"
+        return 0
+    fi
+
+    log_info "首次部署，开始初始化数据库..."
+
+    # 执行初始化脚本
+    if $DOCKER_COMPOSE exec -T postgres psql -U postgres -d iconsulting -f /docker-entrypoint-initdb.d/init.sql > /dev/null 2>&1; then
+        log_success "数据库初始化完成"
+
+        # 验证关键表
+        local admin_count
+        admin_count=$($DOCKER_COMPOSE exec -T postgres psql -U postgres -d iconsulting -tAc "SELECT COUNT(*) FROM admins;" 2>/dev/null)
+        log_info "默认管理员账户已创建 (用户名: admin, 密码: admin123)"
+
+        # 验证 vector 扩展
+        local vector_exists
+        vector_exists=$($DOCKER_COMPOSE exec -T postgres psql -U postgres -d iconsulting -tAc "SELECT EXISTS (SELECT FROM pg_extension WHERE extname = 'vector');" 2>/dev/null)
+        if [ "$vector_exists" = "t" ]; then
+            log_success "pgvector 扩展已启用"
+        else
+            log_warning "pgvector 扩展未能启用，向量搜索功能可能受限"
+        fi
+    else
+        log_error "数据库初始化失败，请检查 init-db.sql"
+        return 1
+    fi
+}
+
 # 启动 Kong 网关 (DB-less 模式)
 start_kong() {
     log_step "启动 Kong API 网关 (DB-less 模式)..."
@@ -547,6 +588,7 @@ start_all() {
     mkdir -p "$PROJECT_ROOT/pids"
 
     start_infrastructure
+    init_database
     start_kong
     start_all_backend "$mode"
     start_nginx
@@ -1187,6 +1229,10 @@ do_db() {
             done
             log_success "数据库迁移完成"
             ;;
+        init)
+            log_step "初始化数据库 (执行 init-db.sql)..."
+            init_database
+            ;;
         seed)
             log_step "初始化种子数据..."
             # 添加种子数据脚本
@@ -1296,7 +1342,7 @@ show_help() {
                                   plugins   - 查看插件列表
 
   db <action>             数据库操作
-                          action: migrate, seed, backup, restore, reset, status
+                          action: init, migrate, seed, backup, restore, reset, status
 
   help                    显示此帮助信息
 
@@ -1310,6 +1356,7 @@ show_help() {
   ./deploy.sh restart user docker       # 重启用户服务 (Docker)
   ./deploy.sh logs conversation 200     # 查看对话服务最近200行日志
   ./deploy.sh clean all                 # 清理所有构建产物和依赖
+  ./deploy.sh db init                   # 初始化数据库 (首次部署)
   ./deploy.sh db backup                 # 备份数据库
   ./deploy.sh db migrate                # 执行数据库迁移
 
diff --git a/docker-compose.yml b/docker-compose.yml
index a21352b..5ad6a65 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -21,7 +21,7 @@ services:
   #=============================================================================
 
   postgres:
-    image: postgres:15-alpine
+    image: pgvector/pgvector:pg15
     container_name: iconsulting-postgres
     restart: unless-stopped
     environment: