The traditional BIM software has deficiencies such as high cost，low efficiency，long installation time，and unavailability for mobile devices. Considering that cloud services are characterized by on-demand service，flexible usage mode，and high resource utilization rate，an attempt is made to combine BIM software with SaaS cloud services，and a Revit-based BIM cloud service construction method is proposed. By comprehensive application of Revit software development，document database，message queue，and other information technologies，the BIM cloud service for rebar application in port engineering is built，and the application verification is carried out in a wharf engineering project. The results show that this method can provide some functions of Revit software to users in the form of cloud service，expanding the usage mode of BIM software，and providing a reference for the construction of similar BIM software cloud service.