As a key platform serving lifelong learning for all citizens, faculty at open universities shoulder multiple responsibilities, including distance teaching, learning support, and career transition services. However, traditional faculty evaluation systems often suffer from unclear evaluation objectives, rigid indicator design, and subjective weight allocation. They particularly overlook the characteristics of distance education and the value of support services, making it difficult to fully reflect the faculty’s actual contributions. To address these challenges, this study centers on developmental evaluation principles, integrating fuzzy mathematics with the Analytic Hierarchy Process (AHP) to construct a scientific evaluation system tailored to the teaching characteristics of open universities. It aims to overcome the evaluation pitfalls of “prioritizing research over service” and “emphasizing outcomes over processes,” providing a systematic solution for faculty professional development and educational quality enhancement.