The invention relates to a method and a system for judging abnormal state of energy price parameters of a metering device, wherein the method includes determining energy consumption value of a metering device in each preset time period in a preset time period according to metering data of a main station of an energy metering management system, the maximum energy consumption value of the preset time period, the theoretical cost value in the preset time period and the actual consumption value in the preset time period, and whether the judgment condition of the energy price parameter abnormalityis satisfied being judged, and if so, the energy price parameter of the measuring equipment being determined to be in an abnormal state. The invention can determine whether the energy consumption state of the user is abnormal or not according to the comparison result of the energy measurement cumulative value and the historical value of the metering equipment under the normal energy consumption condition, and the method and system can be applicable to the system structure constructed by the system master station, acquisition equipment and metering equipment, to judge the energy price parameters of the metering equipment as abnormal states and events, to support the operation and maintenance of the energy metering management system, to improve the work efficiency, and to enhance the reliability of the system operation.