A managing system manages not only an endoscope washer-disinfector performing cleaning and disinfection with an insertion tube of an endoscope but also an endoscope apparatus performing an endoscopic examination using the endoscope. The system comprises an acquiring unit and a manger. The acquiring unit acquires information indicative of a finish time of the endoscopic examination which is the newest and performed by the endoscope apparatus. The manager manages states of the cleaning and disinfection performed by the endoscope washer-disinfector depending on the information indicative of the finish time of the endoscopic examination acquired by the acquiring unit. Every time when an endoscopic examination is finished, the information indicative of the finish time of the endoscopic examination is updated. For example, a length of an elapsing time from the finish of each endoscopic examination is reflected in how the cleaning and disinfection is performed.