Through the study of the multiple dimensions of supplier, this paper comes up with an index system of evaluating the quality of supplier service quality and studies the analysis and design of intelligent assessment system for supplier service quality. Based on the extensive collection of survey research result, the paper form an index set with the KPI method, then form the fuzzy comprehensive evaluation model. This intelligent assessment system map all relevant information of supplier that an earlier entered to the evaluating indicator, then output the assessment result. With the help of this system, the purpose of providing reference for that managers make decisions is attain.