Abstract: The frequency of problems with the primary and secondary equipment of the in-service substation is relatively high. When the equipment fails or the external environment changes, the sound and vibration signals it emits will also change accordingly. Quick identification can assist in the safety management of equipment in the station.To this end, an integrated acoustic and vibration state monitoring device for the power Internet of Things is designed. The device can collect real-time sound and vibration data in the substation environment and during equipment operation, and fuse the data to realize the environment and the environment. The long-term monitoring of equipment operating status provides a solution for overcoming missed judgments and misjudgments easily caused by traditional single-parameter monitoring and diagnosis, and helps to improve the safe working level of unattended substations.