Each of a plurality of endoscopes of an endoscope system is provided with a non-volatile memory in which information inherent to an endoscope, such as the model and manufacturing number, is stored. By a large capacity memory device provided in a server, which is connected with the endoscope through a network, with information inherent to each endoscope, the use condition, the cleaning condition, the cleaning effective period and the like are centrally administrated. Accordingly, the use condition, the cleaning condition and the like of each endoscope used in an endoscopic examination can be confirmed so that the endoscopic examination can be performed smoothly.