This paper studies on a new type design of a real-time monitoring and fault diagnosis system of equipment. The system uses subject knowledge, such as sensor technology, neural network and embedded systems. It regards system voltage and current as the monitoring goals at the same time and shows the text of the system malfunction on the liquid crystal display. The paper introduces a new system monitoring approach combined with text, sound, light alarm to achieve the goal that the process of operating the equipment is safe, stable, balanced and low loss.