A broadcasting signal receiver and a method of controlling the broadcasting signal receiver having a user selection unit, the method including: determining whether a plurality of channels that correspond to a selected channel exist; determining whether the plurality of channels have the same contents if it is determined that the plurality of channels exist; selecting a first channel among the plurality of channels according to a priority if it is determined that the plurality of channels have the same contents; and determining whether the first channel provides a corresponding signal; and selecting a second channel among the plurality of channels according to the priority if it is determined that the first channel does not provide the corresponding signal.