The group eigenvalue method and fuzzy mathematics knowledge is used to assess the comprehensive evaluation of the service level for bus traffic. Analyzing the factors that influence the service level of bus traffic, it puts forward the evaluation index system of service level. In order to evaluate the service level for bus traffic, on the basis of defining remark grade, used the group eigenvalue method to decide the index weight. Then, the scientific and rationality of the evaluation method was detected by application example, acco...