A method for transmitting, by a terminal , uplink control information including acknowledgment information in a 3GPP communication system supporting carrier aggregation , the method comprising: receiving, from a base station , downlink control information including indication information of a resource for transmitting the acknowledgment information; determining a resource of an uplink control channel and a format in which the acknowledgment information and channel information are to be transmitted based on a number of bits of the acknowledgment information, a number of bits of the channel information, and the indication information; and transmitting the acknowledgment information and the channel information in the uplink control channel using the determined resource, wherein, if the number of bits of the channel information is smaller than 12, the acknowledgment information and the channel information are transmitted using: a PUCCH format 2 and a transmission resource of a PUCCH format 2 if the number of bits of the acknowledgment information is 1 or 2, a PUCCH format 3 and a transmission resource indicated by an A/N resource indicator included in the indication information if the number of bits of the acknowledgment information is smaller than 22, or a new PUCCH format having 22 or more bits and a transmission resource indicated by an A/N resource indicator included in the indication information if the number of bits of the acknowledgment information is exceeding 22, and wherein, if the number of bits of the channel information is exceeding 11, the acknowledgment information and the channel information are transmitted using a new PUCCH format having 22 or more bits and: a transmission resource indicated by an CSI resource indicator included in the indication information if the number of bits of the acknowledgment information is smaller than 22, or, a transmission resource indicated by an A/N resource indicator or a CSI resource indicator included in the indication information if the number of bits of the acknowledgment information is exceeding 22. receiving, from a base station , downlink control information including indication information of a resource for transmitting the acknowledgment information; determining a resource of an uplink control channel and a format in which the acknowledgment information and channel information are to be transmitted based on a number of bits of the acknowledgment information, a number of bits of the channel information, and the indication information; and transmitting the acknowledgment information and the channel information in the uplink control channel using the determined resource, wherein, if the number of bits of the channel information is smaller than 12, the acknowledgment information and the channel information are transmitted using: a PUCCH format 2 and a transmission resource of a PUCCH format 2 if the number of bits of the acknowledgment information is 1 or 2, a PUCCH format 3 and a transmission resource indicated by an A/N resource indicator included in the indication information if the number of bits of the acknowledgment information is smaller than 22, or a new PUCCH format having 22 or more bits and a transmission resource indicated by an A/N resource indicator included in the indication information if the number of bits of the acknowledgment information is exceeding 22, and wherein, if the number of bits of the channel information is exceeding 11, the acknowledgment information and the channel information are transmitted using a new PUCCH format having 22 or more bits and: a transmission resource indicated by an CSI resource indicator included in the indication information if the number of bits of the acknowledgment information is smaller than 22, or, a transmission resource indicated by an A/N resource indicator or a CSI resource indicator included in the indication information if the number of bits of the acknowledgment information is exceeding 22. <EOS>