According to the actual problem of energy waste caused by air conditioning, this paper design a dual-loop electric energy meter, which based on the data transmission platform of smart grid to realize the energy saving supervision of air conditioning; Furthermore, based on the clustering algorithm, the typical load curves of two independent loops are obtained to evaluate whether the air conditioner has abnormal power consumption and optimize operation, so as to avoid energy waste caused by unreasonable use of air conditioning. The project has good economic benefits in practical application.