The transient electromagnetic instrument controls the transmitting current waveform through a synchronous transmitting circuit module. The high-speed acquisition module receives data, calculates and configures the optimal gain amplification factor, and then conducts formal data acquisition. After the collected data is subjected to real-time processing and dynamic imaging, it is displayed on the LCD screen, and the data is automatically stored at the same time. Finally, the data can be transmitted to a computer via the USB interface for further analysis and processing.