The current fault detection system has low detection rate and accuracy, and has poor stability. It can not timely and accurately detect the fault of the starting device of special equipment. The starting device design of electromechanical special equipment fault detection system. According to the demand of fault detection system, fault detection indicator unit and data processing unit two transmits the major hardware parts are also improved; on the basis of theoretical framework, the fault detection index were extracted to calculate the frequency of fault detection, fault detection software, complete the design starting device fault detection system of electromechanical special equipment. The experimental results show that the system has high detection rate, high detection accuracy, good system stability and low energy consumption.