Abstract: Virtual reality technology (VRT) is a new humancomputer interface technology that vividly simulates the human actions such as visual sense， hearing sense and movement in natural environment. The application foreground of VRT to hydrogeology is presented. The corresponding geological, hydrogeological and professional models are set up by using the immersion sense, interaction with computer as well as realtime forecast function of VRT so that hydrogeological conditions, groundwater flow, groundwater quality , environmental geological problems such as land subsidence, sea water intrusion, soil desertification, soil salinizationalkalization, swampiness and the development tendency of cone of depression caused by groundwater exploitation, can be represented in the virtual environment. The main steps in realizing virtual reality includes establishing virtual reality database, constructing threedimensional geological model, establishing groundwater flow model, establishing professional model and building realtime forecasting model.

Key words: virtual reality technology (VRT), hydrogeology, database, model, realtime forecast