As a result of engineering construction's unceasing expansion, there are a series of environment geology questions, such as serious environmental pollution, short of land resource, which have influenced enormously the economy and the environment sustainable development. Based on the natural geographic and geological environment conditions of Bojiashan hydroelectric station construction land in Mohe ditch, Luding County, Sichuan province, the assessment of geological environment quality system and model were established with 10 first level assessment factors such as developmental condition of geological hazard, formation lithology, geological structure, slope structure, topographic grade, groundwater, river, rainfall, human engineering activities, and threaten objet of geological hazard. This article makes the present condition assessment about geological environment quality in this hydroelectric station by using the analytic hierarchy process. On the base of present condition assessment, suggestions of geological environment disaster prevention to the construction land have proposed.
