A radiation irradiation detection system includes a radiation generation apparatus that includes a radiation generation unit, an emission control unit controlling emission of the radiation, and an exposure switch unit receiving a radiation irradiation instruction and a radiation stoppage instruction, and a radiation detection apparatus that includes a radiation detector detecting the radiation transmitted through a subject, and a detection control unit controlling the radiation detector, and the emission control unit starts emission of the radiation in a case where the emission permitting signal output from the detection control unit is received while the exposure switch unit is receiving the radiation irradiation instruction, continuously performs emission of the radiation regardless of a reception state of the emission permitting signal in a preset emission period after the radiation starts to be emitted, and stops emission of the radiation in a case where the instruction reception unit receives the radiation stoppage instruction.
