A CPU and an FPGA of the imaging control device receive first identification information and a preparation completion signal indicating that preparation for receiving radiation has been completed from a radiation detector and transmit the first identification information and irradiation conditions of the radiation associated with the first identification information to a radiation generation unit. Then, the CPU and the FPGA receive, from the radiation generation unit, second identification information copied from the first identification information by the radiation generation unit in a case in which irradiation with radiation has succeeded. Then, the CPU and the FPGA collate the first identification information and the second identification information, and determine whether or not to perform automatic brightness control, which sets a brightness level of the radiographic image to a prescribed level and updates the irradiation conditions on the basis of the radiographic image, according to a collation result.