For some monitoring projects needed to be all-round monitoring and modeling,we innovatively apply the high precision Leica MS60 3D laser scanning technology in a monitoring project for roads and buildings in the rear of a port reclamation area.A shift from point monitoring to surface monitoring is realized by the methods of error analysis,performance test,field sweep,internal industry treatment and result contrast analysis.The new technology avoids the limitations and one-sidedness in the traditional point monitoring,and greatly improves the efficiency of the works.Through comparative analysis,we find that 3D laser scanning technology has the advantages of unique function,accuracy and efficiency,and will be widely applied in monitoring engineering.