Abstract: Based on the comprehensive assessment principles of mountainous agroclimatic environmental quality being defined, the indices system and standards for assessment are established and, futhermore, three methods for evaluating (i. e. comprehensive index, fuzzy sets, and distance coefficient in Hilbert Space) are advanced. In this paper, the authors take Kaixian County, Sichuan Province as a example to make a detailed study on quantitative evaluation of agroclimatic environmental quality. Finally, the three methods are compared and discussed.

Key words: Climatic resources Comprehensive index Fuzzy sets Distance coefficent in Hilbert Space, Climatic resources Comprehensive index Fuzzy sets Distance coefficent in Hilbert Space