Disclosed is a system for monitoring a dementia patient in real time. A system for monitoring a dementia patient in real time according to an embodiment of the present invention comprises: an analysis unit which determines the behavior pattern of a patient by comparing and analyzing a variation in predetermined value and a variation in value that is sensed by a wearable device equipped with a gravitational acceleration sensor, a pressure sensor, a Gyro sensor, and a wireless communication module； a fall detection unit which generates a fall detection signal when a variation in gravitational acceleration, sensed by the wearable device, is a first value or greater within first time, and transmits same to a user terminal； a bedsore detection unit which generates a bedsore detection signal when variations in pressure and angular velocity, sensed by the wearable device, are not a second value or greater within second time, and transmits same to the user terminal； a location detection unit which analyzes the location of the patient from multiple internal detection beacons connected to the wearable device； and an escape detection unit which generates an escape detection signal including an escape onset location and escape onset time, when the wearable device is connected to escape detection beacons arranged outside, and transmits same to the user terminal.L'invention concerne un système de surveillance en temps réel d'un patient souffrant de démence. Un système de surveillance en temps réel d'un patient souffrant de démence selon un mode de réalisation de la présente invention comprend: une unité d'analyse qui détermine le modèle de comportement d'un patient par comparaison et analyse d'une variation de valeur prédéterminée et d'une variation de valeur qui est détectée par un dispositif vestimentaire équipé d'un capteur d'accélération gravitationnelle, d'un capteur de pression, d'un capteur gyroscopique et d'un module de communication sans fil； une unité de détection de ch
