The present invention relates to a broadcast signal processing system and a method for searching a storage device thereof. One of the embodiments of the present invention includes a receiving unit configured to receive a broadcast signal, a decoding unit configured to decode the broadcast signal received by the receiver, a display unit configured to display broadcast content according to the broadcast signal decoded by the decoder, an interface unit configured to communicate with the storage device through a wired network or a wireless network, and a control unit configured to control access to the storage device through the interface unit using one of connection information as to the storage device connected by the interface unit and search information as to the storage device searched through the network by the interface unit, and to control storage of the broadcast signal decoded by the decoder in the storage device or playback of content stored in the storage device by the display unit.