Abstract: An electronic device and a login method thereof are provided. The method includes the following steps. A first user information is received. A login authentication message corresponding to the first user information is obtained according to the first user information. A current sequence combination corresponding to a plurality of function buttons being pressed is received, and the function buttons are used for controlling the electronic device to execute a plurality of functions correspondingly. The current sequence combination is compared with a preset sequence combination of function buttons in the login authentication message. Whether a login process of the first user information is completed is determined. Accordingly, difficulties in entering a password may be solved by the function buttons on a remote controller, and an identity authentication may be simplified and quickly completed, so as to provide a better user experience for the user.