A system for monitoring the state of a subject, specifically designed for installation in homes or rooms etc., comprising items of furniture (1) with at least one built-in sensor capable of measuring a physical parameter of the subject a processing unit (3) linked to a piece of software for receiving an electrical signal from at least said sensor and a data communication module (4) for wirelessly transmitting the parameters obtained by at least said sensor. As such, this processing unit (3) generates a signal when it detects an anomalous value or pattern of behaviour linked to at least one parameter received by at least one sensor.