关键词: Vague集, Fuzzy集, 隶属函数, 转化方法

Abstract: The features of Vague sets and Fuzzy sets are introduced.Based on theory of Vague sets and voting model，several methods for transforming Vague sets into Fuzzy sets are analyzed，and problems of the existing methods are pointed out.Finally，according to three-dimension characteristics of Vague sets and combined with the psychological changes in people，a new nonlinear method of effectiveness is presented intuitively，and its correctness and intuition are explained by taking examples.

Key words: Vague sets, Fuzzy sets, membership function, transformation method