Real-time data of power grid operation has become important assets for the development of electric power enterprises, but there is a lack of efficient technical means to access real-time data. Considering the principles of loosely coupled, repeatable, standardized, microservice architecture design, this paper realizes the access scheme design of real-time data for power grid operation based on Microservice Architecture. This scheme unifies the real-time data of different service systems in power gird filed through the designed data access tools, orderly integration in the form of measuring points. At the same time, the efficient integration and access of real-time data of power grid can be realized by establishing power grid asset model. The design can better meet the needs of vertical and horizontal interaction of real-time data in power enterprises.