Abstract. At present, with the increasing demand of electric power resources, the power marketing management becomes more and more complicated, and new requirements of power market management are put forward. According to the current status of the development of electricity market, it will be very important for the development of power marketing market to establish a sound power marketing strategy. This paper makes an in-depth analysis of the power management information system of power supply enterprises. At the same time, the management of power marketing at home and abroad is also discussed, and the existing management system and power demand of power supply enterprises are investigated deeply, especially the functional requirements and non-functional requirements study for the module inside system. The system design is finished from system module division, system module function, system data design and so on. The system uses the more popular Java development tool platform to achieve J2EE architecture as based framework using J2EE components.