The device enables real-time recording of voltage and current waveforms, along with power quality and waveform analysis. Employing synchronous sampling technology, the device achieves simultaneous multi-point, multi-channel data acquisition across distributed locations. It integrates multiple functions, including waveform recording, measurement, monitoring, and communication, supporting applications in distributed recording, synchronous phasor analysis, circuit breaker switching characteristic recording and analysis, power quality recording/analysis, and power grid health monitoring.