Abstract: After Chongqing became a municipality directly under Central Goverment, its area widened from 23,000 km 2 to 82,000 km 2 and its previous resources and environmental data could not meet the needs of government policy-making. It is urgent to systematically analyze geological environmental of Chongqing and evaluate its regional stability. Basing on the available materials and data, the regional stability of Chongqing municipality is evaluated in this paper by using analytical hierarchy process method and Fuzzy mathematics method.