A simulation apparatus according to the present invention performs propagation simulation regarding the radio wave quality of a base station radio wave in a specific area. The apparatus includes: a receiving unit configured to receive, from a plurality of mobile terminals existing in the specific area, measured results of the radio wave quality of a base station radio wave from a base station around the mobile terminal, the field intensity of a GPS wave from a GPS satellite, and a position of the mobile terminal; and a simulating unit configured to identify a mobile terminal having the measured result of the field intensity at or above a predetermined value from the plurality of mobile terminals and correct a propagation equation used for the propagation simulation using the measured result of the radio wave quality at the position of the identified mobile terminal for performing the propagation simulation.