The invention discloses a harmonic generation and governance simulation device and a control method of the harmonic generation and governance simulation device. The harmonic generation and governance simulation device comprises a host machine, a control screen, a waveform display screen, a synthesis wave display screen and a harmonic knowledge show screen, wherein the control screen is respectively connected with the waveform display screen and the harmonic knowledge show screen through the host machine, the synthesis wave display screen is connected with the waveform display screen through the host machine, the synthesis wave display screen is used for displaying synthesized waveforms of each waveform in the waveform display screen, a harmonic governance press button is arranged on the harmonic knowledge show screen, and the harmonic governance press button is used for triggering a harmonic governance scheme so that governed waveforms can be displayed in the synthesis wave display screen in a simulation way. Through triggering the harmonic governance press button, the harmonic knowledge show screen can give out real-time reverse waveforms in the simulation way, and the reverse waveforms are output into the synthesis wave display screen so that the waveforms become sine waves, so a harmonic governance effect is reached, when the equipment is adopted, a plurality of oscilloscopes and filters which are required to be used in the prior art are replaced, the cost is reduced, the use is convenient, and in addition, the use process is simpler.