A radiographic imaging system includes a repeater, a radiographic imaging apparatus, and a control apparatus. The control apparatus controls the radiographic imaging apparatus. The repeater controls timing to emit radiation from a radiation source. The radiographic imaging apparatus includes a communication circuit that wirelessly communicates with an external device in a first communication mode and a second communication mode in which power consumption is lower than that in the first communication mode. The radiographic imaging apparatus also includes a communication control unit that controls the communication circuit so that, when receiving an instruction to start preparation for imaging, the communication circuit operates in the first communication mode until receiving a signal for emission of radiation from the repeater.
