An X-ray image processing apparatus includes a site information determination unit configured to determine, based ON discrete site information, continuous site information to be obtained by radiographing a moving image, an information acquisition unit configured to extract, from the discrete site information, image construction information, image processing method information, and X-ray exposure control method information, a computation unit configured to compute processing information about a site located between positions represented by the discrete site information using the information extracted by the information acquisition unit, an image processing unit configured to perform image processing based ON the processing information which is computed by the computation unit and an X-ray exposure control unit configured to perform X-ray exposure based ON the processing information which is computed by the computation unit.