A radiation emitting device includes a radiation source unit that irradiates a subject with radiation, a camera that captures an image of the subject to acquire a captured image of the subject, and a monitor that displays the captured image. A control device controls at least one of the inclination or the rotation angle of the monitor on the basis of at least one of the direction of the radiation source unit, the inclination of a radiation detector, and the rotation angle of the radiation detector, or the display content of the monitor.