In order to get the accurate alarm about stealing electricity，to solve the problem in timeliness and difficulty in obtaining evidence，we get and analyze the feature quantity of electric energy metering device under abnormal working condition，propose a method of obtaining evidence for electric theft by comparing measurement parameters of primary and secondary parameters，and find out the abnormality of measurement of an electric energy metering device quickly. By collecting and analyzing the environmental parameters of the metering device，the “electric energy metering device which is stealing electricity” is locked accurately and promptly. At the same time，we start the field recording and video，send the stealing information to the inspector. In order to verify the validity and accuracy of this method and device，we carried out 279 simulation tests on the site and the correct rate of the tests is 100 percent. Through the analysis of the judgment of stealing type and antitheft system， we propose a method for accurately recording and video at the spot and abnormal data delivery and realize the research and making of antielectricity stealing accuracy devices based on the abnormal electric metering data.