The investigation on the pathway of urban information model is a key to exploring urban governance. This article, taking the construction of Suzhou CIM platform as a case study, discusses the city life cycle, ranging from planning, construction, management to operation, relating to the techniques of BIM, GIS and IoT from the aspects of spatial value-added practice and digital platform practice. Then it further constructs a new path of Suzhou's digital transformation from perception to analysis and intelligent application, and looks forward to the future of urban digitalization.