Multi-service authentication method based on IPoE and system thereof

The invention relates to a multi-service authentication method based on IPoE. The method comprises the following steps: an access server receives a DHCP Discovery message initiated by a terminal, and the DHCP Discovery message comprises serial number information and service domain information of the terminal; the access server parses and generates an authentication account number; the access server sends the authentication account number and access line information to a certificate server together; based on the authentication account number and the access line information, the certificate server inquires a user database of the certificate server and carries out authentication on the terminal. The invention also relates to a multi-service authentication system based on IPoE. According to the method and the system of the invention, a DHCP Discovery broadcast request is utilized to carry out DHCP authentication, the terminal serial number and service domain information which form the authentication account number not only can only determine a terminal, but also can distinguish different service types, and a service load of one line to a plurality of services is realized; through the authentication account number and the access line information, service authentication is carried out, inputting a username and a password in present authentication technology is not needed, and convenient authentication is realized.