Fuzzy systems have a high ability to model the human thinking and inference system. In recent years, suitable answers have been received from fuzzy logic in solving scheduling problems. One of the problems of today's universities is the allocation of classrooms at a certain time. This problem becomes more apparent with the increase in the diversity of academic fields. Scheduling university classes is one of the most widely used areas of scheduling, which is defined as the assignment of courses to time slots according to resources and considering limitations. This issue is expressed differently for each educational institution according to the special needs of that institution. In this research, after referring to the background of the research in different countries and the importance of its investigation, the definition and fuzzy modeling of the class scheduling problem has been discussed and at the end it has been implemented on the program of the Industrial Engineering Department of Shiraz University. Based on the results obtained from the software solution of the model, we have been able to obtain an accurate solution for the problem.