The present invention relates to an auto channel search apparatus for a TV and a method thereof capable of easily recognizing a broadcast channel of a user. The above-described method includes a step for displaying a channel list in accordance with a channel search instruction of a user and performing a search in the sequence of the number stored in the channel list, and a step for performing an indication operation for separating a channel number which does not have a broadcast signal with respect to a channel number which has a broadcast signal in the channel list. In addition, there are further provided a step for displaying a channel list and channel search screen in which a certain indication is performed at a channel having a broadcast signal by an auto channel search when a user inputs a channel selection memu key after an auto channel search is completed in accordance with a channel search instruction of a user, and a step for displaying a user's last selected channel on a previous screen based on the channel list and search screen.