Aiming at the research status of intelligent technology and unattended technology of artillery in our country, the unattended energy management and construction scheme of artillery is put forward. The variable energy device is used to store energy to realize the rational utilization and distribution of energy. By using neural network and intelligent learning technology, the knowledge system based on task-oriented model rules is realized. Through fault isolation, diagnosis and reconstruction, the autonomous fault management of energy system is realized. The results show that the research can meet the requirements of intelligent, unmanned and information management of ground weapon energy, which is of great significance to the research and engineering application of unmanned energy subsystem of artillery in the future.