Abstract: A method is proposed to evaluate customer satisfaction of knowledge service. The connotation and characteristics of knowledge service are analyzed and the earlier works on the evaluation of service quality are reviewed. Then, an evaluation index system is set up for the customer satisfaction of knowledge service. Further, a fuzzy evaluation method is proposed considering the subjectivity and fuzziness of those indexes. A comprehensive evaluation results of customer satisfaction of knowledge service can be obtained by processing and aggregating linguistic assessment information provided by customers. An example is given to illustrate the applicability and potential of the proposed method.