The invention relates to a method and system for determining the increment of a metering accumulated value of metering equipment to be in a zero state. The method includes the steps that according tometering data of an energy metering management system main station, the energy supply flow value, the consumed energy quantity value of each period, the maximum consumed energy quantity values of periods and the energy supply metering accumulated value of the metering equipment are determined; whether or not the energy supply flow value, the consumed energy quantity value of each period, the maximum consumed energy quantity values of periods and the energy supply metering accumulated value meet the judgment condition that the increment is in the zero state is judged, and if yes, it is determined that the metering accumulated value of the metering equipment is in the zero state. According to the method and system, the comparison result of the energy metering accumulated value of the metering equipment and historic values under normal energy consumption conditions is used for determining whether or not the energy consumption state of a user has abnormality, and the method and system aresuitable for a system structure together constructed by the system main station, collecting equipment and the metering equipment, judge that the increment of the metering accumulated value of the metering equipment is in the zero state and in a zero event, are used for supporting running and maintaining work of an energy metering management system, and improve the working efficiency and system running reliability.