The present disclosure relates a method and apparatus for transmitting uplink control information on a plurality of serving cells for supporting carrier aggregation technology between base stations. The method of a user equipment may include comparing a number K of Uplink Control Informations (UCIs) to be simultaneously transmitted and a number M of UCIs available for simultaneous transmission and selecting M UCIs from UCIs to be simultaneously transmitted when the number K is greater than the number M and transmitting, to a Base Station (BS), the selected M UCIs through a Physical Uplink Control CHannel (PUCCH) of each serving cell. The number M is less than or equal to the N, and the number M is a natural number greater than or equal to 1.