A method for transmitting control information, performed by a user equipment (UE), in a wireless communication system, the method includes generating, by the UE, uplink control information (UCI); and transmitting, by the UE to a base station, the UCI through a physical uplink control channel (PUCCH) in a subframe, wherein, when the subframe is configured for transmission of a scheduling request (SR) and when transmission of a hybrid automatic repeat request acknowledgement (HARQ-ACK) coincides with the subframe, transmission power of the PUCCH is determined based on a payload size of both the HARQ-ACK and the SR.