Abstract: Engineering geology is getting in the period of forecasting and controlling.Geo-engineering,a new branch of engineering geology,is a technique for evaluating,remaking and controlling on moutain mass and region crustal stability.The entity of geo-engineering is complex geomass that is in the state of evolution.The rockmass structure control,engineering geologic mass control and engineering geologic processing control are the three basic theories of geo-engineering.The geological survey, design and construction are combined togather in the geo-engineering,and thedesign such as a bridge for connect the geological survey and construction.A computer-based geo-engineering design supportsystem will be developed to help the geo-engineering.