The technologies of BIM and informatization are applied in the operation and construction stages of airport project in this research, and the BA system is connected to BIM. The transmission of information from the construction stage to the operation stage is accomplished by establishing a 3D intelligent operation framework. The goal of smart airport is achieved by collecting, analyzing and managing data with BIM and integrating the monitoring and control of equipment, people management, maintenance management and emergency management etc. to a unified platform. The strategy proposed in this research is proved to be feasible and practical by deployment and application in the real project.