A central processing device and a central processing method performs: storing a record format that is created in accordance with a type of nursing care, and is designed for inputting details of nursing care as a nursing care record; and, when receiving a type notifying communication signal for issuing a notification of a type of nursing care in a nursing care record from a terminal device, returning a format notifying communication signal containing the record format corresponding to the type of nursing care contained in the type notifying communication signal, to enable the terminal device to input the details of the nursing care for each of the monitored persons while changing the monitored persons. A monitored-person monitoring system according to the present invention includes the central processing device.