With the rapid development of construction industry and BIM technology here and abroad, the requirement for information technology is much more higher. This paper combines with the characteristics of large public building operations management and the advantages of BIM, carries out a detailed inquiry of the operations management for large public buildings based on BIM technology, designs the general structure, network topology structure, function, flow and development suggestions of the operations management system based on the analysis of the demand of the large public operations management. Finally, this paper puts forward the specific project implementation plan and technical route of the designed system, and explains the possible problems in practice.