Abstract: The multiplwalued intuitionistic fuzzy set is extending the traditional intuitionistic fuzzy set. Comparing with the traditional ntuitionistic fuzzy set, the multiplcvalued intuitionistic fuzzy set has better abilities to descript the indefinite, unprecise and incomplete information. But one of the important problems to be solved in applying the multiple-valued intuitionistic fuzzy set is how to fuse these criterions of membership and the nonmembership into one criterion of membership and the nonmembership, thus obtain the synthesis j udgment criterion. This paper researched on this question, and constructed several fusion methods for them.

Key words: Intuitionistic fuzzy set,Multiplcvalucd intuitionistic fuzzy set,Information fusion