An X-ray imaging apparatus and control method for the X-ray imaging apparatus are provided. The X-ray imaging apparatus includes an X-ray source configured to generate and emit X-rays having a preset broadband, an X-ray detector including a plurality of raw pixels configured to detect an average of ten photons or less in response to the X-rays which are emitted and convert the detected photons into an electrical signal, and an image processor configured to produce a plurality of single-energy images corresponding respectively to a plurality of preset energy bands by separating the plurality of raw pixels for each of the plurality of preset energy bands based on the electrical signal, and to produce a multi-energy image using the single-energy images.