diff --git a/change/@acedatacloud-nexior-e00dcacd-6a80-4cc9-8ed1-9aa306a16e19.json b/change/@acedatacloud-nexior-e00dcacd-6a80-4cc9-8ed1-9aa306a16e19.json
new file mode 100644
index 00000000..f11c1000
--- /dev/null
+++ b/change/@acedatacloud-nexior-e00dcacd-6a80-4cc9-8ed1-9aa306a16e19.json
@@ -0,0 +1,7 @@
+{
+  "type": "patch",
+  "comment": "fix chat experience for error",
+  "packageName": "@acedatacloud/nexior",
+  "email": "cqc@cuiqingcai.com",
+  "dependentChangeType": "patch"
+}
diff --git a/src/assets/scss/_common.scss b/src/assets/scss/_common.scss
index 17968060..42c4b895 100644
--- a/src/assets/scss/_common.scss
+++ b/src/assets/scss/_common.scss
@@ -36,6 +36,7 @@ html.dark,
     word-wrap: break-word;
     border-radius: 1rem;
     border: none;
+    --el-card-padding: 15px;
   }
 
   .el-breadcrumb__inner a,
diff --git a/src/components/chat/Message.vue b/src/components/chat/Message.vue
index 6002cb65..a45ea5b7 100644
--- a/src/components/chat/Message.vue
+++ b/src/components/chat/Message.vue
@@ -171,9 +171,13 @@ export default defineComponent({
       return this.$store.state.chat.modelGroup;
     },
     errorText() {
+      console.debug('error', this.message.error);
       if (!this.message.error || !this.message.error?.code) {
         return undefined;
       }
+      if (this.message.error?.message) {
+        return this.message.error.message;
+      }
       switch (this.message.error?.code) {
         case ERROR_CODE_USED_UP:
           return this.$t('chat.message.errorUsedUp');
diff --git a/src/components/user/Center.vue b/src/components/user/Center.vue
index 37e0f3d5..53a6de3a 100644
--- a/src/components/user/Center.vue
+++ b/src/components/user/Center.vue
@@ -1,5 +1,5 @@
 <template>
-  <div class="relative inline-block text-left">
+  <div class="center">
     <div @click="toggleMenu">
       <user-avatar class="cursor-pointer" />
     </div>
diff --git a/src/constants/errorStatus.ts b/src/constants/errorStatus.ts
new file mode 100644
index 00000000..a83a1f2a
--- /dev/null
+++ b/src/constants/errorStatus.ts
@@ -0,0 +1,7 @@
+export const ERROR_STATUS_BAD_REQUEST = 400;
+export const ERROR_STATUS_FORBIDDEN = 403;
+export const ERROR_STATUS_TOO_MANY_REQUESTS = 429;
+export const ERROR_STATUS_NOT_FOUND = 404;
+export const ERROR_STATUS_API_ERROR = 500;
+export const ERROR_STATUS_TIMEOUT = 504;
+export const ERROR_STATUS_BUSY = 500;
diff --git a/src/constants/index.ts b/src/constants/index.ts
index a6918147..6065a4fb 100644
--- a/src/constants/index.ts
+++ b/src/constants/index.ts
@@ -1,4 +1,5 @@
 export * from './errorCode';
+export * from './errorStatus';
 export * from './endpoint';
 export * from './action';
 export * from './chat';
diff --git a/src/layouts/Chat.vue b/src/layouts/Chat.vue
index a17f8395..f630809d 100644
--- a/src/layouts/Chat.vue
+++ b/src/layouts/Chat.vue
@@ -64,7 +64,7 @@ export default defineComponent({
 
   .chat {
     height: 100%;
-    padding: 15px;
+    padding: 45px 0 0 15px;
     flex: 1;
     width: calc(100% - 250px);
     height: 100%;
diff --git a/src/models/error.ts b/src/models/error.ts
new file mode 100644
index 00000000..180ac732
--- /dev/null
+++ b/src/models/error.ts
@@ -0,0 +1,69 @@
+import {
+  ERROR_CODE_API_ERROR,
+  ERROR_CODE_BAD_REQUEST,
+  ERROR_CODE_BUSY,
+  ERROR_CODE_FORBIDDEN,
+  ERROR_CODE_TIMEOUT,
+  ERROR_CODE_TOO_MANY_REQUESTS,
+  ERROR_STATUS_API_ERROR,
+  ERROR_STATUS_BAD_REQUEST,
+  ERROR_STATUS_BUSY,
+  ERROR_STATUS_FORBIDDEN,
+  ERROR_STATUS_TIMEOUT,
+  ERROR_STATUS_TOO_MANY_REQUESTS
+} from '@/constants';
+
+export class BaseError extends Error {
+  public status: number;
+  public code: string;
+  public detail: string;
+  public extraData?: Record<string, any>;
+
+  constructor(status: number, code: string, detail: string, extraData?: Record<string, any>) {
+    super();
+    this.status = status;
+    this.code = code;
+    this.detail = detail;
+    this.extraData = extraData;
+  }
+
+  get message(): string {
+    return `${this.code} - ${this.detail}`;
+  }
+}
+
+export class BadRequestError extends BaseError {
+  constructor(detail: string, extraData?: Record<string, any>) {
+    super(ERROR_STATUS_BAD_REQUEST, ERROR_CODE_BAD_REQUEST, detail, extraData);
+  }
+}
+
+export class ApiError extends BaseError {
+  constructor(detail: string, extraData?: Record<string, any>) {
+    super(ERROR_STATUS_API_ERROR, ERROR_CODE_API_ERROR, detail, extraData);
+  }
+}
+
+export class BusyError extends BaseError {
+  constructor(detail: string, extraData?: Record<string, any>) {
+    super(ERROR_STATUS_BUSY, ERROR_CODE_BUSY, detail, extraData);
+  }
+}
+
+export class ForbiddenError extends BaseError {
+  constructor(detail: string, extraData?: Record<string, any>) {
+    super(ERROR_STATUS_FORBIDDEN, ERROR_CODE_FORBIDDEN, detail, extraData);
+  }
+}
+
+export class TimeoutError extends BaseError {
+  constructor(detail: string, extraData?: Record<string, any>) {
+    super(ERROR_STATUS_TIMEOUT, ERROR_CODE_TIMEOUT, detail, extraData);
+  }
+}
+
+export class TooManyRequestsError extends BaseError {
+  constructor(detail: string, extraData?: Record<string, any>) {
+    super(ERROR_STATUS_TOO_MANY_REQUESTS, ERROR_CODE_TOO_MANY_REQUESTS, detail, extraData);
+  }
+}
diff --git a/src/models/index.ts b/src/models/index.ts
index 32891392..7af779fb 100644
--- a/src/models/index.ts
+++ b/src/models/index.ts
@@ -21,3 +21,4 @@ export * from './headshots';
 export * from './suno';
 export * from './site';
 export * from './exchange';
+export * from './error';
diff --git a/src/operators/chat.ts b/src/operators/chat.ts
index 7a99205d..8b136420 100644
--- a/src/operators/chat.ts
+++ b/src/operators/chat.ts
@@ -1,5 +1,7 @@
 import axios, { AxiosResponse } from 'axios';
 import {
+  ApiError,
+  BaseError,
   IChatConversation,
   IChatConversationAction,
   IChatConversationOptions,
@@ -7,7 +9,7 @@ import {
   IChatConversationResponse,
   IChatConversationsResponse
 } from '@/models';
-import { BASE_URL_API } from '@/constants';
+import { BASE_URL_API, ERROR_CODE_API_ERROR } from '@/constants';
 
 class ChatOperator {
   async chatConversation(
@@ -27,7 +29,19 @@ class ChatOperator {
           body: JSON.stringify(data)
         });
 
-        if (!response.body) throw new Error('ReadableStream not supported.');
+        // check response status
+        if (!response.ok) {
+          const errorText = await response.text();
+          const status = response.status;
+          const errorJson = errorText ? JSON.parse(errorText) : {};
+          const errorMessage = errorJson?.error?.message || 'An error occurred';
+          const errorCode = errorJson?.error?.code || ERROR_CODE_API_ERROR;
+          console.error('Error message:', errorMessage, 'Error code:', errorCode);
+          reject(new BaseError(status, errorCode, errorMessage));
+          return;
+        }
+
+        if (!response.body) throw new ApiError('ReadableStream not supported.');
 
         const reader = response.body.getReader();
         const decoder = new TextDecoder();
diff --git a/src/pages/chat/Conversation.vue b/src/pages/chat/Conversation.vue
index 3f4bbe63..a6d509df 100644
--- a/src/pages/chat/Conversation.vue
+++ b/src/pages/chat/Conversation.vue
@@ -17,7 +17,7 @@
             @restart="onRestart"
           />
         </div>
-        <div class="composer">
+        <div class="starter">
           <composer
             v-model:question="question"
             :disabled="answering"
@@ -38,7 +38,7 @@ import axios from 'axios';
 import { defineComponent, ref } from 'vue';
 import Message from '@/components/chat/Message.vue';
 import { CHAT_MODEL_GROUPS, CHAT_MODELS, ROLE_ASSISTANT, ROLE_USER } from '@/constants';
-import { IChatMessageState, IChatConversationResponse, IChatConversation, IChatMessage } from '@/models';
+import { IChatMessageState, IChatConversationResponse, IChatConversation, IChatMessage, BaseError } from '@/models';
 import Composer from '@/components/chat/Composer.vue';
 import ModelSelector from '@/components/chat/ModelSelector.vue';
 import { ERROR_CODE_CANCELED, ERROR_CODE_NOT_APPLIED, ERROR_CODE_UNKNOWN } from '@/constants/errorCode';
@@ -447,27 +447,23 @@ export default defineComponent({
         });
     },
     async handleRequestError(error: any) {
+      console.error('error happened', error);
       if (this.messages && this.messages.length > 0) {
         this.messages[this.messages.length - 1].state = IChatMessageState.FAILED;
       }
       if (error.name === 'AbortError') {
         console.error('aborted');
         return;
-      }
-      console.error(error);
-      if (axios.isCancel(error)) {
+      } else if (error instanceof BaseError) {
+        console.debug('BaseError', error);
+        this.messages[this.messages.length - 1].error = {
+          code: error.code,
+          message: error.detail
+        };
+      } else if (axios.isCancel(error)) {
         this.messages[this.messages.length - 1].error = {
           code: ERROR_CODE_CANCELED
         };
-      } else if (error?.response?.data) {
-        let data = error?.response?.data;
-        if (isJSONString(data)) {
-          data = JSON.parse(data);
-        }
-        console.debug('error', data);
-        if (this.messages && this.messages.length > 0) {
-          this.messages[this.messages.length - 1].error = data.error;
-        }
       } else {
         if (this.messages && this.messages.length > 0) {
           this.messages[this.messages.length - 1].error = {
@@ -526,7 +522,7 @@ export default defineComponent({
   }
   &.empty {
     position: relative;
-    .composer {
+    .starter {
       position: absolute;
       width: 100%;
       top: 50%;
@@ -543,7 +539,7 @@ export default defineComponent({
       margin-bottom: 15px;
     }
   }
-  .composer {
+  .starter {
     height: fit-content;
   }
 }