Under the background of new energy, based on the technology of the Internet of things, the optimization of the electrical automation system is the main way to enhance the performance of the system, reduce the failure of the system and realize the green design. This paper briefly analyzes the functional requirements of the electrical automation system based on the Internet of things under the background of new energy, and introduces the key technologies from three aspects of system architecture, development technology and frame mode. Based on this, the design and research and development plan of the electrical automation system is mainly elaborated, which is only for the reference of the relevant personnel. © 2018, SHPMedia Sdn Bhd. All rights reserved.