An x-ray imaging apparatus and a method of controlling the x-ray imaging apparatus are provided. The x-ray imaging apparatus a controller configured to control a display to display a first icon indicating a first mounting portion and a second icon indicating a second mounting portion, to receive a user selection the first icon or the second icon that are displayed； and to control the display to distinguish the first icon from the second icon by displaying the first icon in a first color different than a second color of the second icon； to receive state information of a first x-ray detector that is mounted in the first mounting portion； to control the display to maintain display of the second icon that is displayed； and to control the display to display the state information of the first x-ray detector.
