In order to improve the manage efficiency of electronic watt-hour meter, a remote on-line detection system for electronic watt-hour meter based on load control terminal is proposed. The upgrade design and application of load control terminal and the method of electronic watt-hour meter on-line detection under certain load are introduced. In this paper, testing results of using electric energy impulses to compare metering results of load control terminal and electronic watt-hour meter show that the system can detect whether the electronic watt-hour meter measurement performance in the normal range,and have high detection accuracy.