Geotechnical research and technical service involves a wide range of fields, such as site investigation, tunnel construction, reservoir structure, slope stability and foundation excavation. With the progress of the times, geotechnical development focus is changing as well. The issues of infrastructure life extension, environment conservation and green energy industry are becoming increasingly important. Therefore, the traditional geotechnical knowledges are used as the basis to further develop modern technologies, including offshore foundation investigation, operating tunnel repair and maintenance, reservoir safety risk management, groundwater resource evaluation in neighboring area of tunnels, rock excavation failure assessment under high overburden stress condition, innovation technology application (stratum gas concentration detection by FTIR spectrometer, 3D ground penetrating radar, and underwater inspection using remotely operated vehicle). These modern technologies may provide clients with professional consultation and service.