An information processing device is provided that includes: a storage portion associating and storing section information indicating one section of a building structure, first measurement information acquired by signal intensity measurement of a wireless signal transmitted from a surrounding base station in a wireless terminal existing in the one section, and base station identification information; a receiving portion that receives at least one piece of second measurement information acquired by signal intensity measurement, and at least one piece of base station identification information that indicates a base station of a transmission source of the wireless signal; and a selection portion that selects, based on at least one piece of first measurement information associated with the at least one piece of base station identification information and the at least one piece of second measurement information, section information associated with one of the at least one piece of first measurement information.