Uniform identication method and system based on network

This invention provides a unified certification method based on network and a system. A certification server, user terminals and service subsystem are inter- connected by network. A user is only certified for the identity on the certification server and re-directions to the service subsystem selected by the user with the server, the target service subsystem examines the init of authority. A certification method and a system are provided to uniformly certificate the staff for safety management easily.