On today"s abandon the abandoned light of serious adverse to the grid and new energy output volatility problem, often using storage battery to tame, battery charged state of (SOC) estimation for energy storage is of great significance to the safe operation of the system. In this paper, we study the battery SOC operation monitoring system. First of all, the battery monitor physical architecture design, and put forward based on the information transfer mechanism of the Internet of things. On this basis, put forward based on neural network and testing method of battery SOC. Finally using c # and MATLAB mixed programming, validation of the test method.