A thermometer and a body temperature monitoring system comprising same. The thermometer comprises an adhesive layer (10) and an electrical connection layer (20). The top surface of the adhesive layer (10) is adhered to the bottom surface of the electrical connection layer (20). The bottom surface of the adhesive layer (10) is adhered to the axillary skin surface. The electrical connection layer (20) comprises a first control unit and a first display unit. A first sensor (60) is provided between the top surface of the adhesive layer (10) and the bottom surface of the electrical connection layer (20). The first control unit is electrically connected to the first sensor (60) and the first display unit. The first sensor (60) is used for collecting the temperature on the skin surface and generating same into an analog temperature signal. The first control unit is used for obtaining the analog temperature signal, converting same into a digital temperature signal to be sent to the first display unit. A heat insulating layer (70) is laid above the first sensor. The first sensor is located between the adhesive layer (10) and the heat insulating layer (70). The heat insulating layer (70) is adhered to the bottom surface of the electrical connection layer (20), and is used for reducing loss of the heat collected from the skin surface. The thermometer has high measuring accuracy.La présente invention concerne un thermomètre et un système de surveillance de température corporelle comprenant celui-ci. Le thermomètre comprend une couche adhésive (10) et une couche de connexion électrique (20). La surface supérieure de la couche adhésive (10) est collée à la surface inférieure de la couche de connexion électrique (20). La surface inférieure de la couche adhésive (10) est collée à la surface de la peau axillaire. La couche de connexion électrique (20) comprend une première unité de commande et une première unité daffichage. Un premier capteur (60) est disposé entre la surface supéri
