Introduction   In order to solve the limitations of single application architecture system of power grid information system， such as low performance， low development efficiency， difficult to expand， poor fault tolerance etc.

  Method  This paper proposed that the construction of power grid information system adopts micro service architecture.

  Result  We summarizes the microservice architecture scheme， service splitting scheme， containerization ， development of operation and maintenance scheme of power grid informatization.

  Conclusion  The electric power information system transformed by microservice has brought significant improvement to system granularity， software quality and system operation and maintenance. It provides microservice technical route for realizing richer business scenarios， shorter system delivery cycle and higher quality system delivery requirements of power grid informatization.