The invention discloses a transient verification method and system. The method comprises the following steps of generating first standard transient waveform data and second standard transient waveformdata according to a preset transient parameter; converting the first standard transient waveform data and the second standard transient waveform data into a first standard simulation transient waveform and a second standard simulation transient waveform through AD conversion; sampling and converting the second standard simulation transient waveform according to a preset frequency to generate thestandard digital transient waveform of an FT3 protocol; inputting the first standard simulation transient waveform, the second standard simulation transient waveform, and the standard digital transient waveform to a direct current transformer transient verification instrument to be tested; and according to transient parameters which correspond to the three groups of transient waveforms and are output by the direct current transformer transient verification instrument to be tested, determining the verification evaluation result of the direct current transformer transient verification instrumentto be tested.