A radiographic imaging apparatus includes a radiation irradiator configured to irradiate radiation to an object; a radiation detector configured to detect an intensity of the radiation passing through the object; and a loader configured to load the object, and at least one of a movement speed of the loader and a range of radiation irradiation of the radiation irradiator is changed according to a change in the intensity of the radiation, when the change in the intensity of the radiation is greater than or equal to a threshold value.