A radiation imaging control apparatus includes a reception unit configured to receive at least one piece of order information for radiation imaging, a transmission unit configured to transmit, to an external device, a first signal indicating that radiation imaging for the order information is started in response to an instruction being issued for starting radiation imaging corresponding to at least one of pieces of the received order information and to transmit, to an external device, a second signal indicating that radiation imaging for the order information is finished in response to radiation imaging corresponding to the order information being finished, and a control unit configured to limit a transmission of the first signal by the transmission unit if an instruction for starting radiation imaging for the finished order information is issued again.