Abstract: In view of the large number of gateway metering devices,large cycle inspection workload,low efficiency of manual inspection,high inspection cost,long fault location period,and uncontrollable operation status of the gate metering device,this paper proposes to establish a monitoring system for the gate metering device,and a rapid evaluation method for the operating state of the gateway metering device is realized based on decision tree algorithm.In this paper,the demand analysis of the online monitoring system of the gateway metering device is carried out,and then,the decision tree algorithm is introduced.Finally,the decision tree algorithm is applied to study the historical operation data of the gateway metering device,and the result is run in the online monitoring system of the gateway metering device.The results show that the decision tree algorithm can be used to quickly assess the operating state of the gateway metering device.