PURPOSE: To efficiently display many images by displaying a series of inspection images on respective screens of plural CRT monitors in accordance with their sorts and replacing and displaying continuous images in each screen of respective CRT monitors.

CONSTITUTION: A series of inspection images obtained from a subject are displayed on respective screens of plural CRT monitors M1WM6 in accordance with their sorts and the continuous images are replaced and displayed in each screen of the CRT monitors M1WM6. Namely, a series of inspection data obtained from a subject by an image work station are collected in each sort of the inspection images, and in accordance with the sorts of the images, the images are replaced in the vertical direction of plural CRT monitor M1WM6, the images are moved in the horizontal direction or plural images are moved forward or backward in respective CRT monitors M1WM6. Consequently, many images can be efficiently observed also by the restricted number CRT monitors.