With the emergence and application of BIM technology,new requirements are put forward for the development of geotechnical investigation informatization in engineering circles,especially visualization and transmission of investigation information.Using the world’s leading graphics development component HOOPS and combining database and network technology,we develop a computer aided system based on CS architecture for the geotechnical investigation on port and waterway engineering.According to the characteristic and operation procedure of geotechnical investigation on port and waterway engineering,the system provides multiple functions including investigation data integration and processing,3D geological modelling,statistical analysis of investigation results,data check and proofreading,as well as data interfaces with common software,which can increase the reorganization efficiency of investigation data,improve the quality of investigation achievement,and provide reliable 3D geological model for downstream specialties.The system converts the assist mode from original 2D chart into 3D scene and produces 3D investigation results,which provides useful support and reference for 3D design with BIM technology in port and waterway engineering investigation and design enterprises.