Abstract: It is difficult to use mathematical model to predict energy supply/demand due to its complexity. In order to solve the above problem, the paper proposes an energy supply/demand model based on multi-agent. Both the structures and the implementation for every individual agent are defined, and the control rules matched with them are provided. Furthermore, the paper presents the hierarchical infrastructure of energy system based on multi-agent and makes the simulation on Simulink platform. The result shows that the proposed model can effectively realize the prediction for energy supply/demand, which could provide the government a useful tool to make a plan and decision.