Abstract: The authors analyze ecosystem change before and after development area construction from vegetation changing, species changing, the earth’s surface overlay changing, energy current changing and so on taking an example of Changchun hightechnology industry development area. The authors utilize landscape dominance means to calculate decorated blocks density(R_d), frequency(R_f), landscape proportion(L_p) and landscape dominance value(D_o). The highest dominance value is green land 23.78%, second is industry land 20.42%, which indicates that the plan of development area is reasonable and the authorities of the development area pay attention to environmental protection. In ecological satisfaction degree evaluating system composed of 7 index in society, nature and pollution environments, based on definitude index contain number relation, contentment degree related to ecology environment and function influencing people’s life and work is evaluated in this area. The evaluating conclusion indicates that all the index achieve satisfaction degree completely expect of concentrated supplying heat. The investigation result provides feasible evaluating method for environment impact assessment and environment administer in development area or nearby development area.

Key words: development area, urban ecosystem, landscape dominance, ecological satisfaction degree