this will give a chance for the second server identify easily, when the second server detect a phony virtual server or the enter mode of the virtual server is not uniform with the second server, there must have something serious happened, the second server must shut off from the internet or blank off the connection with the electric machine. Then, find out and solve the matter and restart the second server. Besides, the visitor has to do another identify in the second server, each visitor will only has three times to try log on, and the fourth try will be denied, if he try again and again or some abnormity situation happened, the second server will cut off from the virtual server independently. Via introducing this two-level server, the whole web-based network electrical machine control system obtains higher a secure level than the professional network organization that provide the virtual host computer easily, and it'll upgrade with the professional network organization automatically. Thus reduces the maintenance expenses largely, gives a way for the control network and the information network work together closely, and leads the remote motion control network keep up with the information network, has a healthy evolution room and prospers in the future.