The　intelligent　AC　contactor　dynamic　process　is　analyzed　based　on　sequence　image,　which　is　a　key　technology　for　dynamic　process　analysis　of　intelligent　AC　contactor　in　the　study.　Based　on　the　direct　linear　transformation　and　rigid　motion　model,　3D　dynamic　testing　method　of　intelligent　AC　contactor　dynamic　process　is　proposed　based　on　2D　sequence　image　of　intelligent　AC　contactor　dynamic　process　taken　by　high-speed　camera.　2D　motion　characteristics　of　intelligent　AC　contactor　are　gained　by　detecting　feature　points　of　moving　target　from　image　sequence.　According　to　two-　dimensional　coordinate　values　of　the　feature　point,　as　well　as　combined　the　rigid　motion　equation　with　the　constraint　equations　of　projection　relation,　3D　motion　parameters　of　rigid　are　worked　out.　In　the　experimental　test　data,　intelligent　AC　contactor　space　dynamic　characteristics　is　comprehensively　analyzed.　This　measurement　technology　and　the　algorithm　of　3D　motion　parameters　is　an　effective　means　for　intelligent　AC　contactor　3D　dynamic　process　research,　and　it　is　new　research　direction　in　the　field　of　intelligent　electrical　dynamic　research.　©,　2014,　Chinese　Machine　Press.　All　right　reserved.