A comprehensive evah,ation was made of the ecological environments and ecological safety of Chongqing, a theoretical and index system was established for the evaluation and monitoring mechanisms for the region, and the effective approach was explored for the construction of a monitoring and early warning system. Based on the results, a division was made of the ecological-functional zones of Chongqing according to the similarity or difference in the socio-economie development and the indexes of ecological environment and ecological function of the region, and to the consistency of its climatic and topographical features, i.e. 4 first-class zones, 7 second-class zones and 13 third-class zones. These resuhs are of great theoretical and practical significance to ecological environment protection, ecological construction, reasonable lay-out of industrial and agricuhural production, and the monitoring and early warning of ecological safety in Chongqing.