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Energy measurement data are the basic data sources of perceiving smart city and realizing energy conservation and emission reduction. The promotion and application of big data, cloud computing, Internet of things (IoT) and mobile Internet technology drive the rapid development of energy measurement, and it also brings serious challenges for the security of measurement data. The paper introduces the structure of the energy measurement data system and analyzes the current situation and application demands for the system at home and abroad. It focuses on the basic and forward-looking technologies necessary for future energy measurement development, such as the new-generation cryptographic technology, private information protection in energy information network environments, the distribution and application mode of quantum key, secure communication protocol, big data access control, information sharing and fusion, and mass data processing, analyzing and application. The application of all these key technologies in China can provide the basic scientific basis for developing the top-level design and deepening applications of the energy measurement system.

The coordinated management of the measurement equipment in life-cycle is the essential condition for its quality improvement and stable operation. Considering the present situation that each stage data of the electric energy metering equipment life cycle is isolated, a scheme of the life-cycle management for the electric energy metering equipment is designed, which established ten stages of the equipment life cycle from R & D to worthless in use. According to the management and use of each stage data, the design scheme of the life-cycle cloud platform of the electric energy metering equipment based on composite cloud structure is proposed. Meanwhile, the security policy of the cloud platform, which covers three levels of IaaS, PaaS and SaaS, is formulated to achieve efficient and secure data transfer in multiparty data interaction mode. Then the application of cloud platform is studied, especially on the intelligent manufacturing and supervision, intelligent warehouse management in the whole industry chain and the equipment operation state evaluation, to provide support for quality improvement of electric energy metering equipment and reliable operation of metering business.