A human body thermal measurement device including a first sensor configured to measure a first temperature of a core part of the human body, a second sensor configured to measure a second temperature of a peripheral part of the human body, a third sensor configured to measure an ambient temperature surrounding the human body, a memory configured to store information on the first temperature, the second temperature and the ambient temperature, circuitry configured to calculate a difference between the first temperature and the second temperature, and change a first predetermined range according to the ambient temperature, and a user interface configured to output first alert when the difference is determined to be not within the first predetermined range by the circuitry.
