The invention relates to an operation and maintenancedevice of an intelligent ammeter. The device comprises an antiskid cover. A tablet personal computer is arranged on the upper part of the antiskid cover. A frequency meter and a voltmeter and ampere meter detector are parallel arranged under the tablet personal computer. An oscilloscope is arranged under the frequency meter and the frequency meter and the voltage and current detector. A buzzer is arranged under the oscilloscope. The tablet personal computer, the frequency meter, thevoltmeter and ampere meter detector and the oscilloscope are connected with a high-capacity lithium polymer battery. Multiple ports are arranged in the antiskid cover. The device is capable of detecting states of an intelligent ammeter and states of a communication module of the intelligent ammeter, initially detecting operation precision of the intelligent ammeter, judging operation fault code reasons of the intelligent ammeter, providing initial solutions and measuring states of communication connection between the intelligent ammeter and an acquirer in five minutes. The device is the best tool for a worker to perform daily repairing and maintenance in departments of ammeter installing, power connection and measurement.