Abstract: In this paper, the design concept and application practice of a metering and acquisition adaptive power switching device are elaborated in detail. Focusing on the design scheme, the design analysis of circuit design, control strategy and data processing was carried out. Through a series of laboratory tests and on-site installation tests for stability analysis, efficiency evaluation and safety considerations, the problem of offline metering and acquisition equipment caused by power outages was successfully solved, and the need for manual operation and maintenance was reduced, thereby improving service quality and operation efficiency. In addition, the device has significant innovative value and practical significance for improving the efficiency of electricity market-based trading and optimizing power supply management.