The ultra long distance measurement capability enables easy and fast acquisition of a wider range of surface 3D data, which can be used for rapid scanning of rock masses and monitoring of slope deformation. It provides 3D on-site surveying and measurement data, with real-time laser 3D image analysis, providing users with data and technical support, and providing early warning information for on-site rescue personnel. Distance measurement ≥ 2500m, distance accuracy ≤ 5mm, repeatability accuracy ≤ ± 5mm.