Abstract: Aiming at the problems of low degree of automation, high energy consumption and poor emergency response capacity in coal mine drainage process, this paper took the control system of S7-300 and its extended components as the basis points, a kind of automation drainage system based on the control strategy of safety and energy saving was proposed. The principle of automatic monitoring system is described in detail, by using the microprocessor to calculate the pump maximum discharge, the rate of change of the water, water storage volume, power load information and analog signal, and the automatic rotation and drainage of the pump is realized by using the theory of multi parameter fuzzy control. With the use of the case, the system has the advantages of safe, reliable, energy saving and high efficiency.