A monitoring system scheme for non-contact, lossless renaoility test of electric explosive ae- vice (LED) was proposed based on an analysis of all kinds of factors affecting EED reliability test especially the artificial and environmental factors. The scheme is based on the Hall effect principle of electromagnet?ics, using magnet-balanced current sensor as an electronic signal sensor, applying high spped A/D converter or converting board to transform the acquired signal into digital signals stored in random access memory for later processing. Development of the monitoring instrument can reduce human errors, increase ratios in test success, and improve tests on EED firing reliability.