diff --git a/backend-fastapi/ai_platform/services/llm_service.py b/backend-fastapi/ai_platform/services/llm_service.py
index 12e034a..03fbfa7 100644
--- a/backend-fastapi/ai_platform/services/llm_service.py
+++ b/backend-fastapi/ai_platform/services/llm_service.py
@@ -112,7 +112,12 @@ class LLMService:
                 raise ValueError(f'不支持的提供商类型: {provider.provider_type}')
             self._provider_cache[cache_key] = provider_instance
         
-        return self._provider_cache[cache_key], model.model_name
+        provider_instance = self._provider_cache[cache_key]
+        setattr(provider_instance, 'config_name', provider.name or provider.provider_type)
+        setattr(provider_instance, 'config_id', str(provider.id))
+        setattr(provider_instance, 'config_api_base', provider.api_base or '')
+
+        return provider_instance, model.model_name
     
     def _get_provider_sync(self, model_id: str, model_data: dict) -> tuple:
         """
@@ -145,8 +150,71 @@ class LLMService:
                 raise ValueError(f'不支持的提供商类型: {provider_type}')
             self._provider_cache[cache_key] = provider_instance
         
-        return self._provider_cache[cache_key], model_name
+        provider_instance = self._provider_cache[cache_key]
+        setattr(provider_instance, 'config_name', model_data.get('provider_name') or provider_type)
+        setattr(provider_instance, 'config_id', str(provider_id))
+        setattr(provider_instance, 'config_api_base', api_base or '')
+
+        return provider_instance, model_name
     
+    @staticmethod
+    def _extract_upstream_message(error_text: str) -> str:
+        import re
+
+        for pattern in (
+            r"'message'\s*:\s*'([^']+)'",
+            r'"message"\s*:\s*"([^"]+)"',
+        ):
+            match = re.search(pattern, error_text)
+            if match:
+                return match.group(1)
+        return error_text[:240]
+
+    def _format_provider_error(
+        self,
+        exc: Exception,
+        provider: Optional[BaseLLMProvider] = None,
+        model_name: str = '',
+    ) -> str:
+        error_text = str(exc)
+        lower_text = error_text.lower()
+        provider_name = (
+            getattr(provider, 'config_name', '')
+            or getattr(provider, 'provider_name', '')
+            or '未知提供商'
+        )
+        model_text = model_name or '未知模型'
+
+        if (
+            '401' in lower_text
+            or 'unauthorized' in lower_text
+            or 'invalid api key' in lower_text
+            or 'incorrect api key' in lower_text
+            or '无效的令牌' in error_text
+            or '鉴权' in error_text
+        ):
+            reason = '上游模型鉴权失败，API Key 无效或已过期'
+        elif (
+            '404' in lower_text
+            or 'model_not_found' in lower_text
+            or 'model not found' in lower_text
+            or 'does not exist' in lower_text
+        ):
+            reason = '上游模型不存在或当前账号无权访问该模型'
+        elif 'timeout' in lower_text or 'timed out' in lower_text or '超时' in error_text:
+            reason = '上游模型请求超时'
+        elif 'rate limit' in lower_text or '429' in lower_text or 'quota' in lower_text:
+            reason = '上游模型限流或额度不足'
+        else:
+            reason = '上游模型调用失败'
+
+        upstream_message = self._extract_upstream_message(error_text)
+        return (
+            f'{reason}：提供商 {provider_name}，模型 {model_text}。'
+            f'请在 AI 平台的模型提供商配置中检查 Base URL、API Key 和模型名称。'
+            f'上游返回：{upstream_message}'
+        )
+
     def chat_with_provider(
         self,
         provider: BaseLLMProvider,
@@ -197,7 +265,10 @@ class LLMService:
             **kwargs
         )
         
-        return provider.chat(llm_messages, config)
+        try:
+            return provider.chat(llm_messages, config)
+        except Exception as exc:
+            raise RuntimeError(self._format_provider_error(exc, provider, model_name)) from exc
     
     def _convert_messages(self, messages: List[Dict]) -> List[LLMMessage]:
         """转换消息格式，支持 tool 消息"""
@@ -263,7 +334,10 @@ class LLMService:
             **kwargs
         )
         
-        return await provider.chat_async(llm_messages, config)
+        try:
+            return await provider.chat_async(llm_messages, config)
+        except Exception as exc:
+            raise RuntimeError(self._format_provider_error(exc, provider, model_name)) from exc
     
     async def chat_stream(
         self,
@@ -315,8 +389,11 @@ class LLMService:
             **kwargs
         )
         
-        async for chunk in provider.chat_stream(llm_messages, config):
-            yield chunk
+        try:
+            async for chunk in provider.chat_stream(llm_messages, config):
+                yield chunk
+        except Exception as exc:
+            raise RuntimeError(self._format_provider_error(exc, provider, model_name)) from exc
     
     def chat_stream_sync(
         self,
@@ -428,8 +505,11 @@ class LLMService:
             **kwargs
         )
         
-        for chunk in provider.chat_stream_sync(llm_messages, config):
-            yield chunk
+        try:
+            for chunk in provider.chat_stream_sync(llm_messages, config):
+                yield chunk
+        except Exception as exc:
+            raise RuntimeError(self._format_provider_error(exc, provider, model_name)) from exc
     
     @staticmethod
     def get_available_providers() -> List[Dict]:
diff --git a/web/apps/web-ele/src/views/ai-platform/workflow-runs/components/RunLogTimeline.vue b/web/apps/web-ele/src/views/ai-platform/workflow-runs/components/RunLogTimeline.vue
index c5a2213..6b5ad92 100644
--- a/web/apps/web-ele/src/views/ai-platform/workflow-runs/components/RunLogTimeline.vue
+++ b/web/apps/web-ele/src/views/ai-platform/workflow-runs/components/RunLogTimeline.vue
@@ -21,6 +21,11 @@ function formatDuration(ms?: number) {
   if (ms < 1000) return `${ms}ms`;
   return `${(ms / 1000).toFixed(2)}s`;
 }
+
+function getLogError(log: ExecutionLogEntry) {
+  const item = log as any;
+  return item.error || item.error_message || item.message || '';
+}
 </script>
 
 <template>
@@ -52,10 +57,10 @@ function formatDuration(ms?: number) {
             {{ log.node_type }}
           </div>
           <div
-            v-if="log.error"
+            v-if="getLogError(log)"
             class="text-destructive mt-1 line-clamp-2 text-xs"
           >
-            {{ log.error }}
+            {{ getLogError(log) }}
           </div>
         </button>
       </ElTimelineItem>
diff --git a/web/apps/web-ele/src/views/ai-platform/workflow-runs/modules/detail-dialog.vue b/web/apps/web-ele/src/views/ai-platform/workflow-runs/modules/detail-dialog.vue
index 1e26078..d7a6298 100644
--- a/web/apps/web-ele/src/views/ai-platform/workflow-runs/modules/detail-dialog.vue
+++ b/web/apps/web-ele/src/views/ai-platform/workflow-runs/modules/detail-dialog.vue
@@ -178,7 +178,7 @@ const collaborationTimeline = computed(() => {
         subtitle: log.node_label || log.node_id,
         status: log.status,
         summary: summaryParts.join(' · '),
-        message: communication.message || previewValue(log.error || log.output),
+        message: communication.message || previewValue(getLogError(log) || log.output),
         elapsed: log.elapsed_time,
         timestamp,
         tokens: log.tokens_used || 0,
@@ -233,7 +233,7 @@ const collaborationSupportSummary = computed(() => {
         log.node_type,
         log.branch_label,
         previewValue(log.output),
-        previewValue(log.error),
+        previewValue(getLogError(log)),
       ].join(' '),
     )
     .join(' ')
@@ -432,6 +432,21 @@ function getCollaboration(log: any) {
   return getLogMeta(log).collaboration || {};
 }
 
+function getLogError(log: any) {
+  const meta = getLogMeta(log);
+  const communication = meta.communication || {};
+  return (
+    log?.error ||
+    log?.error_message ||
+    log?.message ||
+    meta.error ||
+    meta.error_message ||
+    communication.error ||
+    communication.message ||
+    ''
+  );
+}
+
 function getActorName(log: any) {
   const communication = getCommunication(log);
   const actor = communication.actor || {};
@@ -747,8 +762,8 @@ defineExpose({ open });
                   </template>
 
                   <div class="space-y-3 text-xs">
-                    <div v-if="log.error" class="text-destructive break-words">
-                      {{ log.error }}
+                    <div v-if="getLogError(log)" class="text-destructive break-words">
+                      {{ getLogError(log) }}
                     </div>
                     <div
                       v-if="getCollaboration(log).agent_code || getCommunication(log).channel"
diff --git a/web/apps/web-ele/src/views/ai-platform/workflow/editor/components/ChatPanel.vue b/web/apps/web-ele/src/views/ai-platform/workflow/editor/components/ChatPanel.vue
index 5ae6b97..5c19c58 100644
--- a/web/apps/web-ele/src/views/ai-platform/workflow/editor/components/ChatPanel.vue
+++ b/web/apps/web-ele/src/views/ai-platform/workflow/editor/components/ChatPanel.vue
@@ -89,6 +89,15 @@ watch(
 const generateId = () =>
   `msg-${Date.now()}-${Math.random().toString(36).slice(2, 8)}`;
 
+const getStreamErrorMessage = (
+  event: Error | Partial<WorkflowStreamEvent> | any,
+) =>
+  event?.error_message ||
+  event?.message ||
+  event?.error ||
+  event?.content ||
+  $t('ai-platform.workflow.editor.chatPanel.execFailed');
+
 // 发送消息
 const handleSend = (text: string) => {
   if (!text || running.value) return;
@@ -222,17 +231,13 @@ const runWorkflow = (userMessage: string, inputs: Record<string, any>) => {
     },
     (error) => {
       console.error('Stream error:', error);
+      const errorMessage = getStreamErrorMessage(error);
       updateAssistantMessage(assistantMsgId, {
         status: 'failed',
-        error_message:
-          error.message ||
-          $t('ai-platform.workflow.editor.chatPanel.execFailed'),
+        error_message: errorMessage,
       });
       running.value = false;
-      ElMessage.error(
-        error.message ||
-          $t('ai-platform.workflow.editor.chatPanel.workflowExecFailed'),
-      );
+      ElMessage.error(errorMessage);
     },
     () => {
       cancelStream = null;
@@ -355,11 +360,10 @@ const handleStreamEvent = (event: WorkflowStreamEvent, msgId: string) => {
     }
 
     case 'error': {
+      const errorMessage = getStreamErrorMessage(event);
       updateAssistantMessage(msgId, {
         status: 'failed',
-        error_message:
-          event.message ||
-          $t('ai-platform.workflow.editor.chatPanel.execFailed'),
+        error_message: errorMessage,
       });
       running.value = false;
       break;
@@ -698,17 +702,13 @@ const resumeWorkflow = (userInput: any) => {
     },
     (error) => {
       console.error('Resume stream error:', error);
+      const errorMessage = getStreamErrorMessage(error);
       updateAssistantMessage(assistantMsgId, {
         status: 'failed',
-        error_message:
-          error.message ||
-          $t('ai-platform.workflow.editor.chatPanel.resumeFailed'),
+        error_message: errorMessage,
       });
       running.value = false;
-      ElMessage.error(
-        error.message ||
-          $t('ai-platform.workflow.editor.chatPanel.resumeWorkflowFailed'),
-      );
+      ElMessage.error(errorMessage);
     },
     () => {
       cancelStream = null;
diff --git a/web/apps/web-ele/src/views/ai-platform/workflow/editor/components/RunPanel.vue b/web/apps/web-ele/src/views/ai-platform/workflow/editor/components/RunPanel.vue
index ea84922..3493370 100644
--- a/web/apps/web-ele/src/views/ai-platform/workflow/editor/components/RunPanel.vue
+++ b/web/apps/web-ele/src/views/ai-platform/workflow/editor/components/RunPanel.vue
@@ -152,6 +152,15 @@ const formatTime = (ms: number | undefined) => {
   return `${(ms / 1000).toFixed(1)}s`;
 };
 
+const getStreamErrorMessage = (
+  event: Error | Partial<WorkflowStreamEvent> | any,
+) =>
+  event?.error_message ||
+  event?.message ||
+  event?.error ||
+  event?.content ||
+  $t('ai-platform.workflow.editor.runPanel.execFailed');
+
 const handleRun = () => {
   if (!props.workflowId) return;
   running.value = true;
@@ -185,15 +194,14 @@ const handleRun = () => {
 
         case 'error': {
           stopTimer();
+          const errorMessage = getStreamErrorMessage(event);
           // 将当前运行中的节点标记为失败（优先使用事件中的 node_id）
           const failedNodeId = event.node_id || currentNodeId.value;
           if (failedNodeId) {
             const state = nodeStates.value.get(failedNodeId);
             if (state && state.status === 'running') {
               state.status = 'failed';
-              state.error_message =
-                event.message ||
-                $t('ai-platform.workflow.editor.runPanel.execFailed');
+              state.error_message = errorMessage;
               state.elapsed_time = state.start_time
                 ? Date.now() - state.start_time
                 : 0;
@@ -201,16 +209,14 @@ const handleRun = () => {
                 node_id: failedNodeId,
                 node_type: state.node_type,
                 status: 'failed',
-                error_message:
-                  event.message ||
-                  $t('ai-platform.workflow.editor.runPanel.execFailed'),
+                error_message: errorMessage,
               });
             }
             currentNodeId.value = '';
           }
           result.value = {
             status: 'failed',
-            error_message: event.message,
+            error_message: errorMessage,
             execution_log: nodeStateList.value,
           };
           running.value = false;
@@ -400,32 +406,26 @@ const handleRun = () => {
     (error) => {
       console.error('Stream error:', error);
       stopTimer();
+      const errorMessage = getStreamErrorMessage(error);
       // 将当前运行中的节点标记为失败
       if (currentNodeId.value) {
         const state = nodeStates.value.get(currentNodeId.value);
         if (state && state.status === 'running') {
           state.status = 'failed';
-          state.error_message =
-            error.message ||
-            $t('ai-platform.workflow.editor.runPanel.execFailed');
+          state.error_message = errorMessage;
           emit('node-complete', {
             node_id: currentNodeId.value,
             node_type: state.node_type,
             status: 'failed',
-            error_message:
-              error.message ||
-              $t('ai-platform.workflow.editor.runPanel.execFailed'),
+            error_message: errorMessage,
           });
         }
         currentNodeId.value = '';
       }
-      ElMessage.error(
-        error.message ||
-          $t('ai-platform.workflow.editor.runPanel.workflowExecFailed'),
-      );
+      ElMessage.error(errorMessage);
       result.value = {
         status: 'failed',
-        error_message: error.message,
+        error_message: errorMessage,
         execution_log: nodeStateList.value,
       };
       running.value = false;
diff --git a/web/apps/web-ele/src/views/ai-platform/workflow/index.vue b/web/apps/web-ele/src/views/ai-platform/workflow/index.vue
index 9df3172..6c352a2 100644
--- a/web/apps/web-ele/src/views/ai-platform/workflow/index.vue
+++ b/web/apps/web-ele/src/views/ai-platform/workflow/index.vue
@@ -314,6 +314,18 @@ function getWorkflowFinalOutput(outputs?: Record<string, any>) {
   return previewRunValue(nodeValues.at(-1) || outputs, 800);
 }
 
+function getWorkflowErrorMessage(
+  event: Error | Partial<WorkflowStreamEvent> | any,
+) {
+  return (
+    event?.error_message ||
+    event?.message ||
+    event?.error ||
+    event?.content ||
+    '流程运行失败'
+  );
+}
+
 function pushRunEvent(
   title: string,
   status: 'failed' | 'info' | 'running' | 'success' | 'warning' = 'info',
@@ -451,8 +463,7 @@ function handleWorkflowRunEvent(event: WorkflowStreamEvent) {
     }
     case 'error': {
       runStatus.value = 'failed';
-      runError.value =
-        event.message || event.error_message || event.error || '流程运行失败';
+      runError.value = getWorkflowErrorMessage(event);
       pushRunEvent('流程运行失败', 'failed', runError.value);
       ElMessage.error(runError.value);
       cancelWorkflowRunStream = null;
@@ -477,7 +488,7 @@ function handleRunWorkflow(inputs: Record<string, any>) {
     handleWorkflowRunEvent,
     (error) => {
       runStatus.value = 'failed';
-      runError.value = error.message || '流程运行失败';
+      runError.value = getWorkflowErrorMessage(error);
       pushRunEvent('流程运行失败', 'failed', runError.value);
       ElMessage.error(runError.value);
       cancelWorkflowRunStream = null;
diff --git a/web/apps/web-ele/src/views/ai-platform/workflow/shared/useRunReplay.ts b/web/apps/web-ele/src/views/ai-platform/workflow/shared/useRunReplay.ts
index b95fce9..489504c 100644
--- a/web/apps/web-ele/src/views/ai-platform/workflow/shared/useRunReplay.ts
+++ b/web/apps/web-ele/src/views/ai-platform/workflow/shared/useRunReplay.ts
@@ -50,6 +50,11 @@ function resolveNodeOutput(log: ExecutionLogEntry, run: WorkflowRun) {
   };
 }
 
+function getLogError(log: ExecutionLogEntry) {
+  const item = log as any;
+  return item.error || item.error_message || item.message || '';
+}
+
 function buildReplayInputs(
   logIndex: number,
   logs: ExecutionLogEntry[],
@@ -122,13 +127,13 @@ export function applyRunReplay(
         status: isWaiting ? 'running' : isSuccess ? 'success' : 'failed',
         elapsed_time: log.elapsed_time,
         tokens_used: log.tokens_used,
-        error: log.error,
+        error: getLogError(log),
       },
       executionResult: {
         status: mapLogStatus(log.status || 'completed'),
         elapsed_time: log.elapsed_time,
         tokens_used: log.tokens_used,
-        error_message: log.error,
+        error_message: getLogError(log),
         output: nodeOutput,
         inputs: nodeInputs,
       },