There are a lot of equipment and complex environment in the construction area. When it is necessary to stop work at night or in a bad environment, there are fewer active personnel. If an accident occurs, it is not easy to be found by people. If a laser radar is installed in the construction area, video monitoring linkage and perimeter protection are used to give an early warning, it can make preparations in advance to reduce the accident. Moreover, the laser radar has strong interference ability, high stability and adaptability Use in various environments.