The disclosure provides an X-ray imaging apparatus and control method thereof, which allows the user to diagnose a disease more quickly by determining a sectional image including a feature corresponding to a disease among a plurality of sectional images obtained by reconstructing a plurality of projected images corresponding to a plurality of locations, and displaying an indicator to indicate the feature or a numerical value that scores the disease in the sectional image. According to an embodiment of the disclosure, an X-ray imaging apparatus includes an X-ray source irradiating X-rays to a subject from a plurality of locations； an X-ray detector detecting X-rays irradiated from the plurality of locations and passing through the subject； and a controller configured to obtain a plurality of projected images corresponding to the plurality of locations from the detected X-rays, create a plurality of sectional images by reconstructing the plurality of projected images, determine at least one of the plurality of sectional images having a preset feature in a region of interest, and insert an indicator to indicate the feature to the at least one sectional image.
