Association authentication method of mobile terminal and TV set, TV set and system

The invention relates to an association authentication method of a mobile terminal and a TV set, the TV set and a system. The method comprises the following steps: generating a pseudo random password when the TV is started or the mobile terminal is connected with the TV set, and displaying the password on a TV set screen; receiving an authentication password input by the mobile terminal connected with the TV set; judging whether the authentication password is matched with the pseudo random password or not, and if so, authenticating the mobile terminal and establishing the association between the TV set and the mobile terminal. The method can be used for directly and simply realizing the association authentication of a mobile phone and the TV set so that the association between a mobile phone subscriber and the TV set has the characteristics of instantaneity and uniqueness, the security of the association between the mobile terminal and the TV set is increased, and the privacy of the subscriber in the inter-association operation is protected, and the method is convenient to operate; meanwhile, the random connection of the subscriber is limited.