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 Application of numerical control technology not only brought revolutionary changes to the traditional manufacturing industries, manufacturing became a symbol of industrialization, and with the development of numerical control technology and theexpansion of application fields, his important industries of the economy (such as it,automotive, light industrial, medical) are playing an increasingly important role in the development, because the digital equipment required for these industries is amodern development trends. Numerical control technology and its development trend in the world today, its main research focus in the following areas:

1. high-speed, high-precision processing technology and equipment of a new trend.

2. axis machining and rapid development of combined machine tool.

3. intelligent, open, become the main trend of NC system based on network.

4. attention to the establishment of technology standards and specifications.

Europe and the United States attach great importance to step-NC research, Europe launched the IMS step-NC plan (1999.1.1~2001.12.31). Participation in this scheme has come from Europe and Japan, 20 CAD/CAM/CAPP/CNC users, manufacturers, and academic institutions. Step tools, an American company is a global manufacturing data exchange software developer, he has developed a super model for NC machining information exchange (super model), its goal is a unified specificationdescribes all processes. Present new data exchange format is already equipped with Siemens, fidia and the European osaca-NC on the prototype of CNC system is verified.