A mounting device for mounting a stand device under a ceiling in an operating room incorporates a mounting apparatus extending in the longitudinal direction along a mounting axis configured to bear a connection component of the stand device, in particular a spindle; and a ceiling flange configured to mount the mounting apparatus under the ceiling and to support the stand device on the ceiling; wherein the ceiling flange is mountable in different mounting positions along the mounting axis relative to the mounting apparatus on the mounting apparatus in a way that the mounting device is configured to hold the stand device in a height variable manner in different, in particular predefined, height positions. The invention further relates to a mounting system including such a mounting device.