The idea of building a system based on microservice architecture is proposed. The concept, advantages and disadvantages of micro service architecture are introduced, and the architecture and micro service of the intelligent power supply business hall system based on micro service architecture are designed，Spring Boot is selected as the system infrastructure. The three layer progressive precision power supply service mode based on mobile“Internet +”technology, multi channel and interactive mode is constructed. It has a certain reference for the transformation of Power Grid Corp power supply business hall.