System and method for remotely calibrating metering pump online

The invention relates to the technical field of spent fuel aftertreatment, in particular to a system and method for remotely calibrating a metering pump online. A gas blowing measuring device in the system is communicated with the top of a storage tank through a gas blowing instrument upper pipe, the gas blowing measuring device is communicated with a metering pump calibrating tank through a gas blowing instrument lower pipe, the metering pump calibrating tank is arranged on the side face of the storage tank, and the gas blowing instrument lower pipe is inserted to the position, close to the bottom of the metering pump calibrating tank; a storage tank outlet pipe on the lower portion of the storage tank is communicated with a hole in the lower portion of the metering pump calibrating tank through an electromagnetic valve, a hole is formed in the bottom of the metering pump calibrating tank and connected with an inlet pipe of the metering pump, and a metering pump outlet pipe of the metering pump is connected