A motor state assessment and diagnosis edge device based on ARM processor is introduced, and its underlying hardware architecture and software design are put forward by centering on the characteristics of the edge device under the remote operation and maintenance cloud architecture of motor equipment. The edge device realizes the real-time collection of motor operation parameters, the analysis of key characteristic parameters, and real-time data interaction with the operation and maintenance cloud platform to achieve the monitoring and management of motor operation status. Finally, the edge device is applied to the field environment and the remote motor operation and maintenance cloud platform, proving the effectiveness of the system.