diff --git a/src/python/syssentry/syssentry.py b/src/python/syssentry/syssentry.py
index c87256d9c6b82cdb41c133b9c671b927f3d69151..4a70514370cc69bf0be70eb9a121997cda21f0c7 100644
--- a/src/python/syssentry/syssentry.py
+++ b/src/python/syssentry/syssentry.py
@@ -477,17 +477,19 @@ def main_loop():
         return
     fd_list.append(heartbeat_fd)
 
-    cpu_alarm_fd = cpu_alarm_fd_create()
-    if not cpu_alarm_fd:
-        close_all_fd()
-        return
-    fd_list.append(cpu_alarm_fd)
-
-    bmc_fd = bmc_fd_create()
-    if not bmc_fd:
-        close_all_fd()
-        return
-    fd_list.append(bmc_fd)
+    if CPU_EXIST:
+        cpu_alarm_fd = cpu_alarm_fd_create()
+        if not cpu_alarm_fd:
+            close_all_fd()
+            return
+        fd_list.append(cpu_alarm_fd)
+
+    if BMC_EXIST:
+        bmc_fd = bmc_fd_create()
+        if not bmc_fd:
+            close_all_fd()
+            return
+        fd_list.append(bmc_fd)
 
     epoll_fd = select.epoll()
     for fd in fd_list: