Abstract: This study shows the efforts for establishing an evaluation index system based on the PSR (Pressure-State-Response) model. With the support of the fuzzy neural network, the eco-environment quality of Beijing in 2007 and 2015 was quantitatively assessed using different report units, e.g., county and major function oriented zone (MFOZ). The results showed that: (1) The grade of eco-environment in Beijing from high to low ranged as: far suburbs, near suburbs and downtowns. (2) The eco-environmental quality of ecological conservation development zone and prohibited development area of MFOZ was superior to other types of MFOZ. (3) The eco-environment quality grades of the northern and southwestern areas of Beijing were at level Ⅱ in 2007 and 2015, and the eco-environment quality grade in the southeastern part was gradually increasing, while the eco-environment quality in central and near suburbs of Beijing showed adeterioration trend from 2007 to 2015.

Key words: warming, nutrient, metabolome, season, reduced precipitation