With the development of economy, people's safety consciousness is gradually improving. In order to solve the problems of property loss and personnel security caused by intrusion, theft and destruction, the demand for perimeter security has gradually increased in various industries. Perimeter security can be divided into two categories: the visible and invisible. Nowadays, the visible is gradually replaced by the invisible, because it can’t give an alarm in time and is easy to be destroyed. Benewake designed an invisible perimeter security system, using high-performance single-point long-range LiDAR sensors and cameras or alarms. The system can detect and locate intruder, sound the alarm immediately and trigger related security work for all day long and 7 days a week.