Abstract: A network control system for welding machine based on Ethernet is described.The author utilize the embedded gateway combining with micro-control unit controlling system to fulfill the welding machine connection with Ethernet,which could integrate the welding machine with company information system based on Ethernet and TCP/IP completely,and which could make possible of remote management during the welding production and remote diagnosis of welding machine faults via Ethernet.Utilizing SQL SERVER software,the Net-welding machine managing system was designed,and welding standard database and welding process supervision database were constructed based on web weredevdored.The whole system could fulfill the maintenance of welding criterion database,the remote supervision of welding machine parameters and the remote setup of welding criterion and management based on Network.