The present application relates to a method and apparatus for acquiring a temperature. The method comprises: receiving a first-type temperature measurement value and a second-type temperature measurement value of an object in a first region; on the basis of the first-type temperature measurement value, the second-type temperature measurement value and a first temperature function, determining a second temperature function that indicates a relationship between the first-type temperature measurement value and the second-type temperature measurement value of the object; acquiring a first-type temperature measurement value of the object in a second region; and acquiring a second-type temperature measurement value of the object in the second region on the basis of the second temperature function.