The perimeter security system, relying on the internationally leading "laser interference technology" and "AI noise filtering technology", has powerful detection capabilities and precise identification capabilities, and can achieve all-weather real-time monitoring. Lay the optical fiber detector along the perimeter wall/fence. Once there is any behavior of climbing over, damaging or crawling into the fence, an abnormal signal will be generated, and at the same time, it will be linked to the drone or camera to capture and confirm the alarm. In addition, the optical cable can also be buried underground. Once an illegal person approaches, an alarm will be triggered.