Abstract: In this paper, the fundamental concept, procedure of risk assessment and management is presented in brief. Then it is set forth that environment geology risk assessment and management may consist of the Geohaaards risk assessment, environment geological risk assessment for the exploiture of land resource, and the cost-benefit analysis on drainage basin deployment; returning land from farming to forestry, and water resource exploiture. And the general procedures of environment geological risk assessment supported by GIS are discussed.It is pointed out that during the environment geological risk management process, if the"acceptable risk degree", for the sake of immediate interests, is depressed without measure, the destination is doomed to high environment cost than the usual.