Process of the Ecological Security Research

With the development of global change research, the study of ecological security has become the hotspot around the world. This paper firstly introduces the connotation of ecological security, and then commentates on the present evaluation index system of the ecological security, and based on it this paper summarizes several evaluation methodologies of ecological security at home and abroad, including the mathematical model method, ecological model method, landscape ecology method, and digital terrain model (DIM) method. At last the paper summarizes the problems in the evaluation research, and puts forward the development tendency of evaluation methodology of ecological security in the future.