The heat plate was utilized to solve the problems involving heat transfer due to its superior heat transfer characteristics. The purpose of this thesis is to study the thermal performance of the energy storage system which utilizes heat plate module as heat transfer mechanism. Besides analyze the influence of heat charge by using alumina dioxide combines with water as energy storage material. According to the conclusions of this thesis, the overall heat transfer coefficient, which using heat plate module as heat exchanger, is 0.9 W/m2 ℃ when mass flow rate of water is 0.5 kg/min and that of air is 0.668 m3/min. This value is independent with the inlet temperature of heat plate module, but there exists a linear relationship between the overall heat transfer coefficient and the mass flow rate of water; the overall heat transfer coefficient, which using heat plate module in energy system, is 1.1 W/m2 ℃ when mass flow rate of water is 0.5 kg/min. This value is constant whether in heat charge and heat discharge process. Furthermore, the experimental result shows the optimal mixture portion of alumina dioxide combines with water is 5:4, It also found that the mixture energy storage material arises the heat storage quantity of heat storage system with 6%.