To provide a temperature sensing device which ensures an increase in surface temperature fall for solving the problem that a temperature control system such as heating, ventilation, and air-conditioning systems will not effectively function because the temperature measured by the temperature sensing device may be the one between room temperature and wall surface temperature rather than atmospheric temperature of the room.

The temperature sensing device 100 includes a 1st temperature sensor 104 installed with a 1st interval to the structure, a 2nd temperature sensor 106 installed with a 2nd interval to the structure, and a processor 108 for estimating a 3rd temperature from the 1st/2nd temperatures and the interval spacing between the 1st temperature sensor and the 2nd temperature sensor.