With the rapid development of engineering information technologies such as building Information Model (BIM), geographic information system (GIS), Internet of Things, big data, and cloud computing, and the intelligent management of infrastructure will become an inevitable development trend. Microservice architecture, because of the service component and other related characteristics, using this architecture can build a high availability and low coupling application system, which effectively improves the service quality of the system, and therefore the microservice architecture has gradually become the flow software development architecture. Based on the research of infrastructure digitization and integration of construction and maintenance, this paper proposes the concept of infrastructure intelligent service system (is3) from the perspective of information flow, so as to realize the intelligent management of infrastructure. This paper is based on the system requirements analysis. The intelligent service system of infrastructure with microservice architecture is designed, and its performance is tested through experiment. The test results show that in the brain high development test, the designed service reached no error, and the average response day was stable below 27 ms; in the continuous high concurrent test, the average response time of the designed service side remained within 100 ms when the concurrency is 12000, and no request occurred during the test.