关键词: 直觉模糊集, 包含度, 相似度, 模糊蕴涵算子, 集合基数

Abstract: To the status that intuitionistic fuzzy similarity measures exists in present references are mostly based on intuitionistic fuzzy distance measurement，an intuitionistic fuzzy similarity measure based on inclusion degrees is presented.This paper establishes a series of equations on IFS inclusion degrees by using fuzzy implication operators and set cardinal numbers，reveals the relationship between inclusion degrees and similarity measures and proposes an inclusion degree based IFS similarity measure.The instance indicates that the proposed method can not only resolve the problem，and that it provide a new approach for the research on theory of IFS similarity measurement as well.

Key words: Intuitionistic Fuzzy Sets（IFS）, inclusion degrees, similarity measures, fuzzy implication operators, cardinal numbers set