Abstract: In order to explore the new mode of operation and maintenance management of large-scale data center under advanced technology and the changes and improvements that the new mode can bring to the operation and maintenance management of data center, this paper took China Railway Main Data Center as an example, combined with Building Information Modeling (BIM) data and Internet of Things (IoT) technology, analyzed the operation and maintenance management business requirements of the data center, studied the technology of combining BIM data with real-time data of main electromechanical and information equipment, and designed the operation and maintenance management prototype system based on BIM technology. The functions of the system include park overview, asset management, fire drill and energy consumption management, which not only provides new ideas for exploring new operation and maintenance management mode, but also provides technical reference for implementing intelligent, efficient, safe and sustainable operation and maintenance goals in the future.