With the development tendency of digitalization, informatization and intelligentization in engineering construction management, the application of BIM technologies to improve the intelligence and lean management during the process of project construction and management has become a hot topic in the research and practice of construction engineering. Taking the renovation and expansion project of a municipal water plant in Shenzhen as an example, this paper has studied the control and workflow of cloud-based BIM+Internet management platform in the implementation of water plant renovation and expansion project. It has achieved the visual management of progress, quality, safety, cost and other aspects of the entire project, thus enhance the application value of BIM and digital technologies.