In recent years, the development of digital management of buildings and the rise of BIM technology have greatly integrated computer automation technology into the engineering construction industry. However, there are few studies on the application of the combination of the two in the construction operation and management. This paper takes the teaching building of the School of Civil Engineering of a university as an example, establishes a platform of building digital management based on BIM technology with the help of Revit2016 software and Da Xiang Yun platform and web page production. Through this platform, users can browse 3D modeling, understand the general situation of the college and the architectural structure; Teachers and students can combine BIM model to teach and learn courses, such as project evaluation, building architecture and so on; Combined with the room distribution plan, users can also query the empty classrooms of the teaching building and monitor them. The platform of building digital management constructed in this paper achieves the visual operation of teaching and the intelligent management of buildings by integrating BIM technology with computer web design technology.