The invention relates to a monitoring method and a monitoring device for an abnormal state of metering equipment. The monitoring method comprises the steps of collecting operational data of the metering equipment for metering an automatic system; determining abnormal state information of the metering equipment according to the operational data; acquiring equipment information of the metering equipment, and generating an operation and maintenance work order according to the abnormal state information and the equipment information; sending the operation and maintenance work order to a client side; receiving an operation and maintenance state of the metering equipment fed back by the client side; monitoring the abnormal state of the metering equipment according to the operation and maintenance state, and monitoring the abnormal state of the metering equipment by combining the operational data, the operation and maintenance work order and the operation and maintenance state. Therefore, theproblem of misinformation of the abnormal state caused by inaccurate collected operational data of the metering equipment is avoided, the monitoring accuracy is improved, closed loop monitoring processing of data collection, work order generation and equipment operation and maintenance is formed, and the convenience, pertinence and timeliness of monitoring and operation and maintenance are improved. The invention further provides a monitoring system for the abnormal state of the metering equipment.