In the embodiment of the present invention, when identification information acquired from a drug or instrument to be used on a patient is not included in schedule information stored beforehand, a user is notified to confirm that the identification information is not included in the schedule information. After the notification is provided, in registering the acquired identification information as practice details, the name of a doctor who instructed to use the drug or instrument, which is different from the drug or instrument specified by schedule information, and the reason for the instruction are registered, while associated with the practice details. Accordingly, drugs or instruments necessary for patients can be used in an appropriate manner.