A radiation imaging system includes a plurality of imaging apparatuses configured to generate images based on radiation emitted from radiation generating apparatuses configured to perform radiation irradiation and a control apparatus configured to communicate with the plurality of the imaging apparatuses. The control apparatus comprises: an obtainment unit configured to obtain imaging information from each of the plurality of imaging apparatuses, a selection unit configured to select one imaging apparatus from the plurality of imaging apparatuses based on the imaging information obtained by the obtainment unit, and an image obtainment unit configured to obtain an image from the imaging apparatus selected by the selection unit, and the control apparatus further comprises a setting unit configured to set an imaging apparatus from which imaging information is obtained by the obtainment unit.
