“…In order to validly assess a regional ecological environment, both natural and human factors should be considered when an assessment index system is being established. Referring to a previous research (Gessler et al, 1995;Wilson and Gallant, 1996;Bellmann, 2000;Huang et al, 2000;Wang et al, 2002;Zuo, 2004;Wang, 2004), the assessment index of this research is based on climate, hydrology, soil, landuse, and topographical analysis of the ecological environment, geographic characteristic, spatial scale and data source. There are also ten factors taken from data on climate, vegetation, topography and human population: the sum of the temperatures more than 0°C, sum of the…”