To provide a method for measuring the area of the surfaces of a roof more easily and more accurately.SOLUTION: The method for measuring building according to an embodiment of the present invention includes the steps of: taking an image of a predetermined building; recognizing a predetermined region and a plurality of predetermined objects forming the predetermined region from the taken image; determining the number of the predetermined objects; and determining the area of the predetermined region on the basis of the determined number and the area of the predetermined objects stored in advance.SELECTED DRAWING: Figure 8
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