Abstract: The conception of environmental bearing capacity is organic integration and unification of the conception ofcapacity and carrying capacity. Based on the conception of environmental bearing capacity, the definition, char-acteristic and function of the environmental bearing capacity are studied. Regional environmental bearing capaci-ty has many functions and actions, such as service, restrict, safeguard, efficienc, adjust, convey and purity. Quantitative analysis is the core of theory of environment bearing capacity. Accordingly, a basic framework, content and principle for the evaluate indicator system of regional environmental bearing capacity are put for-ward. This indicator system has four tiers: Target tier A (regional environmental bearing capacity), Principaltier B (includes natural resource bearing capacity index B 1, social and economic resource bearing capacity index B 2, degree of sustainable development of bearing capacity index B 3), Index tier C (includes air environmentalbearing capacity index C 1, water resource bearing capacity index C 2, land resource bearing capacity index C 3 Crbiologic resource bearing capacity index C 4, population bearing capacity inedx C 5, economic development bearingcapacity index C 6, foundational installations bearing capacity index C 10, societal installations bearing capacity index C 8, science and educational bearing capactiy index C 9, preponderant degree index C 10, potential degree in-dex C 11, saturation index C 12, regulate and control index C 13), Index tier D (100 material index). The systemconsists of weighted coefficient values for evaluate indicators based on the combination of the hierarchy analysismethods as well as the expert opinions methods. This indicator system is conductive to the ascertaining of theregularities of the dynamic changes and the trend of evolveent in regional environmental bearing capacity. It isalso a useful means for the regional sustainable development planning.

Key words: PRED system, sustainable agriculture, Dongchangfu county