A method for receiving positive acknowledgement/negative-acknowledgement, ACK/NACK, information in a wireless communication system, the method performed by a user equipment to which a plurality of serving cells are allocated, and comprising: transmitting uplink data through a physical uplink shared channel, PUSCH; and receiving ACK/NACK information for the uplink data through a physical hybrid-ARQ indicator channel, PHICH, wherein the PHICH is a control channel carrying ACK/NACK information in response to uplink transmission, wherein a serving cell that receives the ACK/NACK information is selected from one or more serving cells to be monitored by the user equipment to detect an uplink grant that schedules the PUSCH, wherein the user equipment: transmits first uplink data through a PUSCH of an uplink component carrier 0, UL CC 0, based on a first uplink grant received through an enhanced physical downlink control channel, EPDCCH, of a downlink component carrier 0, DL CC 0, wherein the EPDCCH is a control channel located in a data region and wherein the DL CC 0 and the UL CC 0 configure a first serving cell, receives ACK/NACK information for the first uplink data through a PHICH of the DL CC 0, transmits second uplink data through a PUSCH of a UL CC 1 based on a second uplink grant received through an EPDCCH of the DL CC 0, wherein a DL CC 1 and the UL CC 1 configure a second serving cell, and receives ACK/NACK information for the second uplink data through a PHICH of the DL CC 0. transmitting uplink data through a physical uplink shared channel, PUSCH; and receiving ACK/NACK information for the uplink data through a physical hybrid-ARQ indicator channel, PHICH, wherein the PHICH is a control channel carrying ACK/NACK information in response to uplink transmission, wherein a serving cell that receives the ACK/NACK information is selected from one or more serving cells to be monitored by the user equipment to detect an uplink grant that schedules the PUSCH, wherein the user equipment: transmits first uplink data through a PUSCH of an uplink component carrier 0, UL CC 0, based on a first uplink grant received through an enhanced physical downlink control channel, EPDCCH, of a downlink component carrier 0, DL CC 0, wherein the EPDCCH is a control channel located in a data region and wherein the DL CC 0 and the UL CC 0 configure a first serving cell, receives ACK/NACK information for the first uplink data through a PHICH of the DL CC 0, transmits second uplink data through a PUSCH of a UL CC 1 based on a second uplink grant received through an EPDCCH of the DL CC 0, wherein a DL CC 1 and the UL CC 1 configure a second serving cell, and receives ACK/NACK information for the second uplink data through a PHICH of the DL CC 0. transmits first uplink data through a PUSCH of an uplink component carrier 0, UL CC 0, based on a first uplink grant received through an enhanced physical downlink control channel, EPDCCH, of a downlink component carrier 0, DL CC 0, wherein the EPDCCH is a control channel located in a data region and wherein the DL CC 0 and the UL CC 0 configure a first serving cell, receives ACK/NACK information for the first uplink data through a PHICH of the DL CC 0, transmits second uplink data through a PUSCH of a UL CC 1 based on a second uplink grant received through an EPDCCH of the DL CC 0, wherein a DL CC 1 and the UL CC 1 configure a second serving cell, and receives ACK/NACK information for the second uplink data through a PHICH of the DL CC 0.