Ground-based 3D laser scanning is a relatively new data collection and analysis technique
which can scan the object quickly and acquire the high resolution
high density 3D coordinates of points. The 3D laser scanning technology and the principle of new scanning are introduced; and the main 3D scanning equipments are compared. 3D laser scanning technique can be applied to slope stability monitoring and rock fracture faces survey. Compared with the technology of traditional geotechnical monitor and geology survey
the 3D laser scanning technique has the advantages of high accuracy
high speed and low cost of human resources; and it has great potential for future application.