In order to highlight the role of big data platform in remote monitoring, digital intelligent operation and maintenance and decision-making of new energy power stations, solve the problems of "large but not precise" big data of new energy, lack of in-depth big data analysis and intelligent application, and can not effectively guide production operation and maintenance, relying on the construction of China Datang Group new energy big data platform, This paper proposes a new energy digital intelligent operation monitoring technology based on big data platform. By establishing a group of wind power, photovoltaic production data quality standardization system, realizing the standardization of operational data collection code edge side edge computing and distributed algorithm model, adopted in the cloud side of "cloud synergy" architecture, quality of monitoring data, generate the production application processing scheme, in order to realize the actual should be real-time monitoring indices such as output. At the same time, the intelligent analysis platform, system optimization platform, expert support platform and resource evaluation platform for the intelligent operation of new energy are developed, and the "comprehensive physical examination-system optimization-analysis of difficult diseases-resource data support" are successively completed. Build an industry-leading digital intelligent operation monitoring platform based on the construction of "monitoring area" and "functional area" , and realize the multi-domain digital intelligent operation and supervision of new energy at the three levels of "group, region and station" . It can provide reference for the construction of intelligent operation supervision of new energy based on big data platform.