With the continuous development of smart grid technology, the number of power collection and metering devices has increased significantly. The events of the lack of power measurement often occur due to device failure, which seriously affects the normal operation of power marketing, resulting in large losses. Therefore, this paper explores the relevant factors and calculation methods of the missing amount of electricity caused by the electric energy metering management system. The basic structure and operation function of the electric energy metering management system are introduced. Based on the circuit theory, this paper analyzes different types of electric energy metering algorithms, explores the main reasons for the lack of electricity and the calculation method of the lack of electricity, and puts forward the formula calculation method of the lack of electricity based on the metering automation technology. The case analysis results show that the method proposed in this paper can accurately calculate the amount of electricity loss, which is of great significance to reduce the economic loss of enterprises and improve the level of power marketing services.