Method for transmitting/receiving signals using multiple carriers in wireless communication system and device therefor

The present application discloses a method whereby user equipment receives signals from a base station via a first carrier and a second carrier in a wireless communication system. More specifically, the method comprises the steps of: receiving a downlink control channel on the first carrier; and receiving at least one downlink data channel on the first and second carriers on the basis of the downlink control information, wherein the first carrier is for use as a downlink, the second carrier is for use as an uplink or a downlink, and the downlink control channel includes information regarding the use of the second carrier.