diff --git a/frontend/src/components/Step5Interaction.vue b/frontend/src/components/Step5Interaction.vue
index 7c5999c..77395dc 100644
--- a/frontend/src/components/Step5Interaction.vue
+++ b/frontend/src/components/Step5Interaction.vue
@@ -315,6 +315,10 @@
         <div v-if="activeTab === 'survey'" class="survey-container">
           <!-- Survey Setup -->
           <div class="survey-setup">
+            <!-- Env status warning -->
+            <div v-if="!isEnvAlive" class="survey-env-warning">
+              ⚠️ {{ $t('step5.envNotRunning') || 'Simulation environment is not running. Survey requires an active simulation environment.' }}
+            </div>
             <div class="setup-section">
               <div class="section-header">
                 <span class="section-title">{{ $t('step5.selectSurveyTarget') }}</span>
@@ -414,7 +418,7 @@
 import { ref, computed, watch, onMounted, onUnmounted, nextTick } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { chatWithReport, getReport, getAgentLog } from '../api/report'
-import { interviewAgents, getSimulationProfilesRealtime } from '../api/simulation'
+import { interviewAgents, getSimulationProfilesRealtime, getEnvStatus } from '../api/simulation'
 
 const { t } = useI18n()
 
@@ -445,9 +449,9 @@ const chatInputRef = ref(null)
 // Survey State
 const selectedAgents = ref(new Set())
 const surveyQuestion = ref('')
+const isEnvAlive = ref(false)
 const surveyResults = ref([])
 const isSurveying = ref(false)
-
 // Report Data
 const reportOutline = ref(null)
 const generatedSections = ref({})
@@ -782,6 +786,16 @@ const scrollToBottom = () => {
 }
 
 // Survey Methods
+const checkEnvStatus = async () => {
+  if (!props.simulationId) return
+  try {
+    const res = await getEnvStatus({ simulation_id: props.simulationId })
+    isEnvAlive.value = res.success && res.data?.running === true
+  } catch {
+    isEnvAlive.value = false
+  }
+}
+
 const toggleAgentSelection = (idx) => {
   const newSet = new Set(selectedAgents.value)
   if (newSet.has(idx)) {
@@ -945,6 +959,7 @@ onMounted(() => {
   addLog(t('log.step5Init'))
   loadReportData()
   loadProfiles()
+  checkEnvStatus()
   document.addEventListener('click', handleClickOutside)
 })
 
@@ -2155,6 +2170,18 @@ watch(() => props.simulationId, (newId) => {
 
 /* Survey Container */
 .survey-container {
+  /* env warning */
+}
+
+.survey-env-warning {
+  background: #FFF3CD;
+  color: #856404;
+  border: 1px solid #FFEAA7;
+  border-radius: 6px;
+  padding: 10px 14px;
+  margin-bottom: 12px;
+  font-size: 0.85rem;
+}
   flex: 1;
   display: flex;
   flex-direction: column;
diff --git a/locales/en.json b/locales/en.json
index 544c68b..3108b43 100644
--- a/locales/en.json
+++ b/locales/en.json
@@ -75,7 +75,13 @@
     "layoutGraph": "Graph",
     "layoutSplit": "Split",
     "layoutWorkbench": "Workbench",
-    "stepNames": ["Graph Build", "Env Setup", "Run Simulation", "Report Generation", "Deep Interaction"]
+    "stepNames": [
+      "Graph Build",
+      "Env Setup",
+      "Run Simulation",
+      "Report Generation",
+      "Deep Interaction"
+    ]
   },
   "step1": {
     "ontologyGeneration": "Ontology Generation",
@@ -282,7 +288,8 @@
     "errorOccurred": "Sorry, an error occurred: {error}",
     "noResponse": "No response",
     "requestFailed": "Request failed",
-    "selectAgentFirst": "Please select a simulated individual first"
+    "selectAgentFirst": "Please select a simulated individual first",
+    "envNotRunning": "Simulation environment is not running. Survey requires an active simulation environment."
   },
   "graph": {
     "panelTitle": "Graph Relationship Visualization",
@@ -662,4 +669,4 @@
     "generateInterviewQuestionsFailed": "Failed to generate interview questions: {error}",
     "generateInterviewSummaryFailed": "Failed to generate interview summary: {error}"
   }
-}
+}
\ No newline at end of file
diff --git a/locales/th.json b/locales/th.json
index fd333fb..8922f03 100644
--- a/locales/th.json
+++ b/locales/th.json
@@ -75,7 +75,13 @@
     "layoutGraph": "กราฟ",
     "layoutSplit": "แบ่งหน้าจอ",
     "layoutWorkbench": "พื้นที่ทำงาน",
-    "stepNames": ["สร้างกราฟ", "ตั้งค่าสภาพแวดล้อม", "จำลอง", "สร้างรายงาน", "โต้ตอบเชิงลึก"]
+    "stepNames": [
+      "สร้างกราฟ",
+      "ตั้งค่าสภาพแวดล้อม",
+      "จำลอง",
+      "สร้างรายงาน",
+      "โต้ตอบเชิงลึก"
+    ]
   },
   "step1": {
     "ontologyGeneration": "การสร้างออนโทโลยี",
@@ -282,7 +288,8 @@
     "errorOccurred": "ขออภัย เกิดข้อผิดพลาด: {error}",
     "noResponse": "ไม่มีคำตอบ",
     "requestFailed": "คำขอล้มเหลว",
-    "selectAgentFirst": "กรุณาเลือกบุคคลที่จำลองก่อน"
+    "selectAgentFirst": "กรุณาเลือกบุคคลที่จำลองก่อน",
+    "envNotRunning": "สภาพแวดล้อมจำลองไม่ได้ทำงานอยู่ แบบสำรวจต้องการสภาพแวดล้อมจำลองที่ยังทำงานอยู่"
   },
   "graph": {
     "panelTitle": "การแสดงผลความสัมพันธ์กราฟ",
diff --git a/locales/zh.json b/locales/zh.json
index cd747e2..34f5d7f 100644
--- a/locales/zh.json
+++ b/locales/zh.json
@@ -75,7 +75,13 @@
     "layoutGraph": "图谱",
     "layoutSplit": "双栏",
     "layoutWorkbench": "工作台",
-    "stepNames": ["图谱构建", "环境搭建", "开始模拟", "报告生成", "深度互动"]
+    "stepNames": [
+      "图谱构建",
+      "环境搭建",
+      "开始模拟",
+      "报告生成",
+      "深度互动"
+    ]
   },
   "step1": {
     "ontologyGeneration": "本体生成",
@@ -282,7 +288,8 @@
     "errorOccurred": "抱歉，发生了错误: {error}",
     "noResponse": "无响应",
     "requestFailed": "请求失败",
-    "selectAgentFirst": "请先选择一个模拟个体"
+    "selectAgentFirst": "请先选择一个模拟个体",
+    "envNotRunning": "模拟环境未运行。问卷调查需要模拟环境处于运行状态。"
   },
   "graph": {
     "panelTitle": "Graph Relationship Visualization",
@@ -662,4 +669,4 @@
     "generateInterviewQuestionsFailed": "生成采访问题失败: {error}",
     "generateInterviewSummaryFailed": "生成采访摘要失败: {error}"
   }
-}
+}
\ No newline at end of file