PURPOSE: To provide a at-home patient monitoring device which can be easily operated by his family doctor side by transmitting diagnosis information from the patient side device according to a fixed protocol and automatically outputting the diagnosis information on the receiving side.

CONSTITUTION: Diagnosis information sent from the at-home patient side transmits through a subscriber's line l1 → an exchanger 5 → a subscriber's line l2 to reach the centralized supervisory and control equipment side. The reached patient's diagnosis information is recorded as image information on recording paper 10 by a facsimile apparatus 7. Graphs, patient's ID and data picking time, or time zone in addition to the diagnosis data can be recorded on the recording paper 10. The diagnosis information is stored in s transaction device 8 at need. The his family doctor can diagnose perceptually by observing the recording paper 10. As the patient's ID is also recorded on the recording paper 10, the doctor can specify a patient and give a telephone call to the patient 1 at need by a telephone 9 to instruct prescription crally.