Abstract: This paper introduces a portable power abnormal detection equipment and system. The detection equipment can detect the real-time value of circuit node current online and realize wireless long-distance data transmission. The detection system collects, stores, analyzes and integrates the data of all circuit nodes. The system carries out intelligent self-adaptive analysis and judgment of abnormal power consumption through mathematical analysis model. The system can set the abnormal threshold of power consumption online according to the actual application scenarios. The system can display the detection data and judgment results in real time, and also has the functions of data storage and query.