Different management departments of urban underground pipe network construction use different information technologies, and information management systems also belong to the distributed management systems. The information island phenomenon is not uniform between the distributed systems because of the application technology and the information format.The information management transmission mode with deep application integration technology of GIS (Geographic Information System)and BIM (building information model)as its core realizes integrated application of the above two techniques from data and system, solves the problem between different systems of data format conversion, breaks the barriers of information among various systems and various departments, and thus realizes data exchange and information sharing.Information management mode based on the integrated application technology is an effective model to ensure the scientific, efficient and safe operation of underground pipe network in smart city.