The present invention relates to a method and a device for cancelling interference of a terminal in a wireless communication system. More specifically, the method comprises the steps of: receiving information on N (N is a natural number) subbands of a neighboring cell; decoding an interference signal of the neighbor cell on the basis of the information on subbands of the neighbor cell; and cancelling the interference caused by the neighbor cell from a signal which is received from a serving cell, on the basis of the decoded interference signal, wherein the information on the subbands indicates a transmission mode TM of the neighbor cell.