An operating method of a video display device is provided. The method includes: obtaining at least one of user's bio information and pattern input; upon the receipt of a user input for a function key input of the video display device within a predetermined time, performing an operation personalized to the user on the basis of at least one of the obtained user's bio information and pattern input and the function key input; and upon the receipt of the user input for the function key input after the predetermined time elapses, performing an operation corresponding to the function key.