A smart infant anti-kidnapping system based on the Internet of things comprises a mobile terminal (1), a communication gateway device (2), a signal receiver (3), a signal repeater (4), a long-distance reader (5), a wristband (6), a wrist strap (61), a temperature sensing probe (62), an infrared detector (63), a heart rate sensor (64), a wristband body (65), a battery unit (66), a wrist clasp (67), a display screen (68), an electronic tag (69), an access controller (7), an audio device (71), a touchscreen (72), an exit monitor (8), a management server (9), an alarm device (10), and a camera (11). The signal receiver (3) and the exit monitor (8) are mounted in a monitoring area of a hospital, and an electronic tag (69) that can emit a radio frequency signal and that does no harm to a human body is worn on an infant, thereby implementing the safety monitoring function. The signal receiver (3) can at any time receive signals emitted by the electronic tag (69) on the infant, so that the state of the infant can be determined according to the signals, so as to immediately trigger an alarm upon an attempt to kidnap an infant and so as to track the signals. In addition, the infrared detector (63) senses whether the wristband (6) is removed, such that a warning alarm is triggered once it is detected that the wristband leaves the wrist.Un système intelligent anti-enlèvement denfant basé sur lInternet des objets comprend un terminal mobile (1), un dispositif de passerelle de communication (2), un récepteur de signal (3), un répéteur de signal (4), un lecteur longue distance (5), un bracelet (6), une sangle de poignet (61), une sonde de détection de température (62), un détecteur infrarouge (63), un capteur de fréquence cardiaque (64), un corps de bracelet (65), une unité de batterie (66), un fermoir de poignet (67), un écran daffichage (68), une étiquette électronique (69), un contrôleur daccès (7), un dispositif audio (71), un écran tactile (72), un moniteur de sortie (8), un
