This paper introduces the development of a detection system of the electric energy meter based on multithreading technology. The detection system consists of data management system and detection hardware part. The detection device can output different rated voltage and calibration current at different testing units simultaneously, and the electric energy pulses under different loads can be calculated by using the same standard electric energy meter. Thus, the electric energy meter of different testing unit can be checked completely independently. This research is a secondary development from the existing technique. The design and data management are very helpful for improving the detection efficiency of gateway electric energy meters.