In a digital TV broadcast signal receiver connected to a multi-directional antenna called smart antenna, a time necessary for deciding an optimum signal receiving direction of each receivable channel is shortened with using local information relating to a location of the multi-directional antenna and information of TV towers including location information of TV towers and channel information of channels, TV broadcast signals of which are transmitted from each TV tower. When the local information is inputted, the digital TV broadcast signal receiver identifies at least one TV tower and selects a channel based on the channel information. An optimum signal receiving direction of the selected channel are decided as the optimum signal receiving directions of all the channels transmitted from the same TV tower.