Abstract: In view of development direction of power big data application in the energy internet circumstances, the technological framework and key technological system of power big data are proposed in this paper, and its applicable scenarios and application mode are also defined, which help for the developing research on power big data. In addition, an energy public data service platform suitable for energy internet environment is put forward to act as a future “analysis-application center” of the energy internet, which will provide necessary basic data support and decision support for the entire energy grid operation.