The architectural design service, a knowledge intensive industry, expands rapidly in china. The evaluation of architectural design services is necessary for managers in architectural design service industry to upgrade their service level and for consumers who purchase the services to select an architectural design vendor. However, the evaluation of architectural design services is a multiple-criteria decision making (MCDM) problem that is not easy to make a decision. Hence, we propose fuzzy analytical hierarchy process (FAHP) approach to evaluate the architectural design vendors. In addition, a case study is presented to demonstrate how the approach can help in solving such problems in practice.