Data is an important resource and key production factor in the digital economy era. It can be exploited and utilized by human beings and bring significant economic，management and social benefits. Power data has the unique advantages of high accuracy，high real-time，high value，and large volume，which are different from data in other fields. It has been widely used in power grid operation perception and prediction，enterprise lean management，customer personalization and other aspects. The applications play an important role in the operation and development of electric power industry and enterprises. At the same time，with the existence of a close and wide link between power data and social-economic development，power data is also the “barometer” of economic and social development，reflecting the whole real-time electricity consumption of national economic and social operation. Big data analysis of electric power will provide diversified decision-making strategies for economic development and hot issues concerning people’s livelihood.