A reading device, applied with at least one temperature sensing device and at least one external device the temperature sensing device electrically connected with the reading device, comprising at least one temperature sensing patch which is capable of attaching on human skin, and sensing as well as recording body temperature change the outer device being connected with, the reading device by a wireless communication the reading device comprising: a housing, a data transmission port group, a screen, an external device connection port group, a memory unit, a processor unit, a control interface, and a wireless communication unit the reading device is capable of reading and integrating the body temperature data obtained from the temperature sensing patch, and transmitting rapidly to the external device, whereby the medical personnel could quickly and easily know a patients body temperature change, and effectively determine the patients condition
