Provided is a system for allocating a radio resource. The system for allocating a radio resource may include a macro base station, a macro terminal, and a femto base station. The femto base station may allocate a radio resource for transmitting a control channel to a femto terminal, and transmit information of the allocated radio resource to the macro base station. The macro base station may allocate a radio resource for transmitting a control channel to the macro terminal in relation to the received information of the radio resource.