With　the　rapid　development　of　Internet　technology　and　intelligent　technology,　it　is　an　inevitable　trend　for　manufacturing　industry　to　move　from　traditional　manufacturing　to　digital　manufacturing　and　intelligent　manufacturing.　As　the　＇mother　machine＇of　production　and　manufacturing,　CNC　equipment　has　various　types　and　communication　modes,　which　makes　it　difficult　to　monitor　various　types　of　CNC　equipment　in　the　workshop.　This　paper　proposes　an　abstract　connection　method　for　CNC　machine　tools　by　comparing　and　analyzing　the　common　communication　methods　and　data　acquisition　schemes　of　various　mainstream　CNC　systems.　It　can　be　applied　to　the　data　acquisition　of　most　advanced　CNC　machine　tools,　and　can　effectively　solve　the　communication　obstacles　between　enterprise　management　system　and　different　CNC　systems.　The　code　of　machine　tools　connected　by　the　server　is　reduced　to　at　least　20%　of　the　original.　©　2021　IEEE.