diff --git a/src/locales/en-US/clusters.ts b/src/locales/en-US/clusters.ts
index 892ec7ec..254d4995 100644
--- a/src/locales/en-US/clusters.ts
+++ b/src/locales/en-US/clusters.ts
@@ -162,6 +162,9 @@ export default {
   'clusters.volume.configMap.name': 'ConfigMap Name',
   'clusters.volume.configMap.optional': 'Optional',
   'clusters.volume.add': 'Add Volume Mount',
+  'clusters.systemDefaultContainerRegistry.title': 'Default Container Registry',
+  'clusters.systemDefaultContainerRegistry.tip':
+    'Default registry used to resolve GPUStack images for this cluster. Falls back to the server default when unset.',
   'clusters.k8sOptions.title': 'K8s Deployment Options',
   'clusters.imageCredentials.title': 'Image Credentials',
   'clusters.imageCredentials.add': 'Add Credential',
diff --git a/src/locales/ja-JP/clusters.ts b/src/locales/ja-JP/clusters.ts
index 9475e831..c48e9f50 100644
--- a/src/locales/ja-JP/clusters.ts
+++ b/src/locales/ja-JP/clusters.ts
@@ -162,6 +162,9 @@ export default {
   'clusters.volume.configMap.name': 'ConfigMap Name',
   'clusters.volume.configMap.optional': 'Optional',
   'clusters.volume.add': 'Add Volume Mount',
+  'clusters.systemDefaultContainerRegistry.title': 'Default Container Registry',
+  'clusters.systemDefaultContainerRegistry.tip':
+    'Default registry used to resolve GPUStack images for this cluster. Falls back to the server default when unset.',
   'clusters.k8sOptions.title': 'K8s Deployment Options',
   'clusters.imageCredentials.title': 'Image Credentials',
   'clusters.imageCredentials.add': 'Add Credential',
diff --git a/src/locales/ru-RU/clusters.ts b/src/locales/ru-RU/clusters.ts
index 565a8171..74751b2a 100644
--- a/src/locales/ru-RU/clusters.ts
+++ b/src/locales/ru-RU/clusters.ts
@@ -163,6 +163,9 @@ export default {
   'clusters.volume.configMap.name': 'ConfigMap Name',
   'clusters.volume.configMap.optional': 'Optional',
   'clusters.volume.add': 'Add Volume Mount',
+  'clusters.systemDefaultContainerRegistry.title': 'Default Container Registry',
+  'clusters.systemDefaultContainerRegistry.tip':
+    'Default registry used to resolve GPUStack images for this cluster. Falls back to the server default when unset.',
   'clusters.k8sOptions.title': 'K8s Deployment Options',
   'clusters.imageCredentials.title': 'Image Credentials',
   'clusters.imageCredentials.add': 'Add Credential',
diff --git a/src/locales/tr-TR/clusters.ts b/src/locales/tr-TR/clusters.ts
index d46ecfdc..eb02c863 100644
--- a/src/locales/tr-TR/clusters.ts
+++ b/src/locales/tr-TR/clusters.ts
@@ -163,6 +163,9 @@ export default {
   'clusters.volume.configMap.name': 'ConfigMap Name',
   'clusters.volume.configMap.optional': 'Optional',
   'clusters.volume.add': 'Add Volume Mount',
+  'clusters.systemDefaultContainerRegistry.title': 'Default Container Registry',
+  'clusters.systemDefaultContainerRegistry.tip':
+    'Default registry used to resolve GPUStack images for this cluster. Falls back to the server default when unset.',
   'clusters.k8sOptions.title': 'K8s Deployment Options',
   'clusters.imageCredentials.title': 'Image Credentials',
   'clusters.imageCredentials.add': 'Add Credential',
diff --git a/src/locales/zh-CN/clusters.ts b/src/locales/zh-CN/clusters.ts
index acd07485..698336d2 100644
--- a/src/locales/zh-CN/clusters.ts
+++ b/src/locales/zh-CN/clusters.ts
@@ -155,6 +155,9 @@ export default {
   'clusters.volume.configMap.name': '配置名称',
   'clusters.volume.configMap.optional': '可选',
   'clusters.volume.add': '添加卷挂载',
+  'clusters.systemDefaultContainerRegistry.title': '默认容器镜像仓库',
+  'clusters.systemDefaultContainerRegistry.tip':
+    '用于解析该集群 GPUStack 镜像的默认镜像仓库。未设置时回退到服务端默认值。',
   'clusters.k8sOptions.title': 'K8s 部署选项',
   'clusters.imageCredentials.title': '镜像仓库凭证',
   'clusters.imageCredentials.add': '添加凭证',
diff --git a/src/pages/cluster-management/components/cluster-form.tsx b/src/pages/cluster-management/components/cluster-form.tsx
index 710964c7..85d46526 100644
--- a/src/pages/cluster-management/components/cluster-form.tsx
+++ b/src/pages/cluster-management/components/cluster-form.tsx
@@ -64,8 +64,18 @@ const ClusterForm: React.FC<AddModalProps> = forwardRef(
     // "no auth". Coerce empty form values to null before sending so a blank
     // input is unambiguous rather than an empty string that defeats fallbacks.
     const normalizeOutgoing = (values: any): any => {
-      const opts = values?.k8s_options;
-      if (!opts) return values;
+      const base: any = { ...values };
+      // Top-level cluster field shared by Docker and K8s. Trim then coerce a
+      // blank input to null so clearing it on edit (or a whitespace-only
+      // value) falls back to the server default rather than persisting an
+      // empty string.
+      if (base.system_default_container_registry !== undefined) {
+        base.system_default_container_registry =
+          base.system_default_container_registry?.trim() || null;
+      }
+
+      const opts = base.k8s_options;
+      if (!opts) return base;
 
       const next: any = { ...opts };
 
@@ -90,7 +100,7 @@ const ClusterForm: React.FC<AddModalProps> = forwardRef(
         };
       }
 
-      return { ...values, k8s_options: next };
+      return { ...base, k8s_options: next };
     };
 
     const handleOnFinish = (_values: FormData) => {
diff --git a/src/pages/cluster-management/config/yaml-template.ts b/src/pages/cluster-management/config/yaml-template.ts
index b9b2b6ee..75b4a41d 100644
--- a/src/pages/cluster-management/config/yaml-template.ts
+++ b/src/pages/cluster-management/config/yaml-template.ts
@@ -9,7 +9,6 @@ export const dockerConfig = `# This is a template for worker_config.
  
 # ========= container & image ===========
  
-# system_default_container_registry: "docker.io"
 # image_name_override: "gpustack/gpustack:dev"
 # image_repo: "gpustack/gpustack"
  
@@ -53,7 +52,6 @@ export const kubernetesConfig = `# This is a template for worker_config.
  
 # ========= container & image ===========
  
-# system_default_container_registry: "docker.io"
 # image_name_override: "gpustack/gpustack:dev"
 # image_repo: "gpustack/gpustack"
 
diff --git a/src/pages/cluster-management/step-forms/advance-config.tsx b/src/pages/cluster-management/step-forms/advance-config.tsx
index 76e5f9a9..69bf13ff 100644
--- a/src/pages/cluster-management/step-forms/advance-config.tsx
+++ b/src/pages/cluster-management/step-forms/advance-config.tsx
@@ -88,6 +88,24 @@ const ClusterAdvanceConfig: React.FC<{
       >
         <CInput.TextArea required={false} trim={false}></CInput.TextArea>
       </Form.Item>
+      {/* Default container registry used to resolve images for this cluster.
+          A top-level cluster field shared by both Docker and Kubernetes
+          providers (the backend hoists any legacy worker_config value onto
+          this column). */}
+      <Form.Item<FormData>
+        name="system_default_container_registry"
+        style={{ marginBottom: 16 }}
+      >
+        <CInput.Input
+          label={intl.formatMessage({
+            id: 'clusters.systemDefaultContainerRegistry.title'
+          })}
+          description={intl.formatMessage({
+            id: 'clusters.systemDefaultContainerRegistry.tip'
+          })}
+          placeholder="docker.io"
+        ></CInput.Input>
+      </Form.Item>
       <Title>
         {intl.formatMessage({ id: 'clusters.create.workerConfig' })}
       </Title>