In order to deal with the fuzzy, multitude index and heterogeneous information in water environment audit performance, the heterogeneous information and multitude index synthesis evaluation method under the consideration of decision makers(DM) behaviors is proposed.Firstly, water environment audit performance evaluation index system is built.Then, five different types of index, including real number, interval number, triangular fuzzy number, linguistic variable and intuitionistic fuzzy number, are used to describe heterogeneous evaluation information.Furthermore, by considering the effect of DM behaviors on water environment audit performance evaluation and applying the prospect utility theory, a computing method is proposed for each water environment audit performance heterogeneous evaluation index with regard to positive and negative ideal solution.According to the computing method, the evaluation level of water environment audit performance with heterogeneous information is confirmed and the evaluation steps are instructed.Finally, a numerical example is given to illustrate the effectiveness and rationality of the proposed method.