With the continuous advancement of smart grid construction, the numbers of the operating acquisition terminals in the power system are dramatically increasing. Faced of massive amounts of acquisition electricity data, it is particularly urgent how to excavate valuable information quickly to guide the development of enterprises and serve the people. This paper introduces the use of electric information collection system of distributed architecture to collect electricity data, establish big data cloud platform. The effect of line loss management, the accurate prediction of air quality and load for the future are markedly elevated, utilizing large data analysis methods such as BP neural network algorithm. Moreover in some new fields, such as photovoltaic, vehicle network, the research on the application of big power data is prospected.. The research is expected to have important guiding significance for the further application of large power data in the future.