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In order to solve the problems of limited information sampling port, high expansion cost and limited function diversity of PLC, a full vanadium flow battery (VFB) management system based on ARM was designed. The system used hall sensors to collect voltage and current signal, modified Kalman filter to estimate residual charge (SOC). Meanwhile, MCGS configuration software is used to realize the real-time monitoring of the data, as well as fault diagnosis and display, and to control the activation and mixing of the vanadium electrolyte, and select the corresponding working mode and time. The system can realize real-time data monitoring of battery side voltage, current and temperature signals, system fault diagnosis and protection, and can store and upload data remotely.The on-line test results show that the SOC estimation error can be controlled within ±2%, the battery charging time is shortened by 25%, and the real-time response speed is fast. The system can improve the utilization rate of the battery, prevent the battery from overcharging and overdischarging, and run reliably. It has been put into batch development and production.