The　rapid　development　architecture　of　complex　CNC　machine　tool　and　its　key　technologies　were　studied　in　order　to　promote　the　capabilities　of　self-development　and　innovation　of　the　native　machine　tool　enterprises.　The　research　focus　on　the　integration　framework　of　system　and　modeling　methodology,　which　help　to　construct　a　development　system　with　knowledge-driven　and　application　system-embedded　processes,　that　is　to　say,　modular　design　of　machine　tool,　performance　optimization　and　simulation,　product　cost　estimation　and　evaluation,　etc.,　should　be　real-time　embedded.　The　design　modules　of　system,　such　as　conceptual　design,　performance　test,　product　cost　estimation　and　evaluation,　were　developed　based　on　client/server　framework.　Moreover,　the　further　development　based　on　CATIA　V5,　ANSYS　and　ADAMS　were　performed　by　using　VisualBasic.　NET,　as　well　as　using　ADO.NET　to　access　Oracle　9i　stored　procedures,　The　system　maintenance　module　and　project　management　module　were　developed　based　on　browser　/server　framework.　On　the　other　hand,　the　modeling　methodology　of　intelligent　digital　mock-up　based　on　KBE(Knowledge-Based　Engineering)　was　put　forward　to　satisfy　the　design　requirements　of　intelligence　and　automation.　Finally,　machine　center,　as　an　instance,　was　taken　to　approve　validity.