Disclosed are a medical image display device for displaying a screen including a medical image and a medical image processing method thereof, the medical image display device comprising: a display configured to display a first medical image obtained by photographing an object comprising at least one anatomical entity; and at least one processor configured to extract reference region information corresponding to the anatomical entity from at least one second medical image used as a reference image for the first medical image, detect a region corresponding to the anatomical entity from the first medical image based on the extracted reference region information, and control the display to display the region of the detected anatomical entity to be distinguishable from at least one region unrelated to the anatomical entity.