Geotechnical engineering investigation should be carried out with the perspective purpose of understanding the knowledge of the ground conditions through fundamental planning and construction of infrastructural objects like excavation pit, various foundation, land reclamation, and beach nourishment, and so on. During the processing, hydrogeology takes an essential part in geotechnical engineering investigation by analyzing the recharging status of how water gets into the ground, how water flows in the subsurface through aquifers, and how groundwater interacts with the surrounding soil and rock. This review mainly analyzes the hydrogeological problems in geotechnical engineering investigation, and puts forward corresponding measures and suggestions for hydrogeology in combination with the work.