Abstract:In order to improve the instruments and meters testing ability of energy flow balance testing and the efficiency of online instruments and meters calibration, In this paper, models of instruments calibration based on energy flow balance are established to change the methods from manual operation or laying network to simply using QR code to collect and transform data to computing cloud for analyzing. The experimental results show that the method can verify metrology instruments and meters effectively and discover energy consumption leakage and meter’s malfunction in visualization, as well as can provide online metrology instruments calibration efficiently and economically with GPS synchronously.