Abstract: By integrally providing a medical organization, via a communication network, with a variety of medical data measured from a patient staying at home, a medical system for at-home patients makes it possible to make an appropriate diagnosis from a long distance. The system is equipped with an improved emergency reporting unit. The system includes a plurality of home units set up at the homes of patients, one or more center units at the local medical organization, and a network interconnecting these units via communication lines. The medical data are transmitted from the home units to center units via interface units which correspond to various measurement apparatuses. The system also has an emergency reporting function based on vital signs of a patient.