Abstract: In order to improve the intelligent operation and maintenance level and service quality of university teaching buildings, combined with the characteristics and operation and maintenance needs analysis of typical university teaching buildings, this article designs and develops an intelligent operation and maintenance management platform based on BIM and Unity technology. Firstly, an overall scheme for the intelligent operation and maintenance system is devised. This includes the infrastructure construction, technical framework process, and data information flow. Furthermore, the development of each functional module involves creating and configuring a three-dimensional information model, developing a data management system, designing and constructing a large visual screen, as well as real-time monitoring of equipment and facilities. The practical application outcomes of Zhangzidao Teaching Building demonstrate that the operation and maintenance platform can effectively achieve the objectives of visualizing 3D models, electronically storing, and retrieving data information, visualizing monitoring data. This platform addresses the prevalent issues of low informatization and outdated management approaches in university teaching buildings. Consequently, it holds significant potential for promotion and application, and serves as a crucial reference for the design and development of subsequent smart campus and smart city operation and maintenance systems.