Shaanxi Hwatec Technology co., Ltd firstly developed the Hwatec 6th open-structure CNC system domestically with a complete independent intellectual property rights. Based on the multi-CPU, general industrial motherboard and parallel processing technology, this multi-axis linkage PC+I/O open-structure system has totally surpassed the overwhelmingly taken CNC systems of the 4th NC system and 5th PC+NC/NC+PC enclosed NC system in the international market, and it perfectly worked with the 6th PC+I/O software-based structure, the integrated structure of PC+ power interfaces and distributed structure of PC+ real-time network. It has fully realized the synchronous progress with the modern computer and network information technology. With the advantages of easily produced, high reliability, expansibility and maintainability, it provided technological base for CNC technology to break through the traditional embedded system and enclosed structure.