PROBLEM TO BE SOLVED: To provide a technology for effectively supporting an observation action by a doctor.SOLUTION: An examination information reception part 170 receives past examination information on a subject. An image acquisition part 152 acquires an observation image of the subject photographed by an imaging device. A display control part 160 causes a display device to display the observation image acquired by the image acquisition part 152 and the information on an observation region included in the examination information received by the examination information reception part 170. A completion information reception part 202 receives region observation completion information indicating that the observation of the observation region corresponding to the information displayed on the display device is completed, and a region information registration part 204 registers the region observation completion information.
