The invention discloses a router authority authentication method and a router authority authentication system. The router authority authentication method comprises steps that biological characteristic information having identity identification uniqueness is acquired; the acquired biological characteristic information is transmitted to a database by a router, and the database is used to store the authority information of the router; according to the biological characteristic information, the searching in the database is carried out in order to determine whether the matched biological characteristic information exists; when the matched biological characteristic information exists, authority information associated with the biological characteristic information is acquired, and the authority information is fed back; according to the fed back authority information, service corresponding to the router is adjusted. The biological characteristic information is used for an intelligent wireless router internet access authority authentication system, and by using the identity identification uniqueness of the biological characteristic information and the accuracy of the biological characteristic information identification, the safety and the convenience of the authentication are improved.