Abstract:In view of the research and practical application of big data technology, the actual application status of big data technology is summarized. In the application of big data demand side management in foreign enterprises, the application theme and management mode of the big data technology of four big energy enterprises of France electric power company, Baltimore gas electric company of the United States, the Edison Co of the southern California and the German eon electric power company are introduced. Through the above introduction, this paper summarizes the enlightenment of all kinds of big data applications in three aspects of data platform construction, data management and data analysis, that is to focus on building a unified big data platform, and using the cloud deployment method as the mainstream method for the construction of big data platform at present, and the unified data standard specification is beneficial to data sharing and Data management and control to maximize the value of data resources; the application of big data analysis has two characteristics: firstly, big data analysis and application should be closely related to business needs, with professional application as the center of gravity, equipped with sufficient human resources, accurate focus of business pain points, and quickly solve business problems. Secondly, enterprises should carry out research on basic technology and basic application in combination with business characteristics and development requirements, and provide services and support for professional level analysis applications.