diff --git a/main/main.cpp b/main/main.cpp
index 66b66bf..2641153 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -17,6 +17,7 @@
 #include "esp_system.h"
 #include "esp_efuse.h"
 #include "esp_efuse_table.h"
+#include "sntp_time.h"
 #include "bh1750_use.h"
 #include "aht30.h"
 #include "MQ-2.h"
@@ -129,6 +130,20 @@ static void status_task(void *arg)
     }
 }
 
+static void sntp_task(void *arg)
+{
+    (void)arg;
+
+    if (wait_for_wifi_connected(pdMS_TO_TICKS(15000))) {
+        esp_err_t sntp_ret = sntp_timp_sync_time(10000);
+        if (sntp_ret != ESP_OK) {
+            ESP_LOGW(TAG, "SNTP sync failed: %s", esp_err_to_name(sntp_ret));
+        }
+    }
+
+    vTaskDelete(NULL);
+}
+
 extern "C" void app_main(void)
 {
     vTaskDelay(pdMS_TO_TICKS(100));
@@ -154,6 +169,9 @@ extern "C" void app_main(void)
         set_var_system_ip(wifi_connect_get_ip());
     }
 
+    // 4. 独立 SNTP 对时任务
+    xTaskCreate(sntp_task, "sntp_task", 4096, NULL, 4, NULL);
+
     // 初始化继电器 (独立配置每个通道)
     const relay_config_t relay_cfg[RELAY_CTRL_ID_MAX] = {
         {.pin = GPIO_NUM_9, .active_high = false},