A　new　set　technology　of　precision　worm　gear　pair　was　introduced　herein.　With　the　core　idea　of　＇error　induced　remodeling　and　self　accurate　offset＇,　an　intelligent　iFMT　instrument　for　mechanical　transmission　error　detection　was　developed　to　realize　the　accurate　detection　of　transmission　errors.　In　order　to　realize　the　technology,　a　new　worm　gear　mother　machine　embedded　with　iFMT　instrument　was　developed,　which　may　realize　the　integrated　function　of　machining　and　measurement.　Combined　with　cutting　tools,　new　standards　and　supporting　technologies,　an　ultra-precision　worm　gear　pair　with　double　side　accuracies　of　DIN　standard　grade　1　was　obtained　finally.　©　2022,　China　Mechanical　Engineering　Magazine　Office.　All　right　reserved.