In order to solve the problems of high coupling,high maintenance cost and expansion difficulty of equipment management system with monolithic architecture,key technologies of microservice based equipment management system were studied,a multi-layer equipment management system architecture based on microservice was established,and a business scenario-driven microservice decomposition method was proposed.The use case-data access model was established by analyzing domain scenarios,the relational degree between use cases and data tables were calculated and converted to a relational matrix,the clustering algorithm was used to realize the microservice decomposition.The case study of a bearing manufacturing enterprise shows that this method can obtain reasonable microservice decomposition results and provide decision support for developers.