In the process of pushing forward the smart grid construction, the standardization shows its self-evident significance during the smart grid construction. This paper introduces profession scope of IEC/TC95 (measuring relays and protection equipment), activity of six international standards maintenances teams; discusses the market demand, the trends in technology and trade, the ecological environment, and the work programmer and the future work in the IEC/TC95. It introduces the published IEC/TC95 standards and maintenance, and puts forward the IEC/TC95 standards system planning and SAC/TC154 standard system planning, which provide a good reference for the design, manufacturing, testing, operation and maintenance of relay protection and maintenance of the IEC/TC95 international standards and SAC/TC154 national standards. With the smart grid planning and development, the study will play a regulated and guide role in the construction and operation of our smart grid standards.