A capsule endoscope system includes: a receiving device that receives in-vivo images captured by a capsule endoscope inserted into an organ of a subject; and an image display device that acquires ID information of one or more capsule endoscopes, acquires through the receiving device the in-vivo images captured by the capsule endoscopes identified by the ID information, and displays thereon the in-vivo images thus acquired. The image display device is connected via a communication network to a central server that uniformly manages information about the capsule endoscopes, notifies the central server the ID information of the one or more capsule endoscopes, acquires information about the one or more capsule endoscopes from the central server, and performs a warning process about the one or more capsule endoscopes according to the information thus acquired.