Observation is performed with a fluorescence image having high quantitativeness by satisfactorily eliminating dependencies on distance and angle that remain in an image subjected to division. Provided is a fluoroscopy system 1 including a fluoroscopy apparatus (100); a calibration device (101) equipped with a standard specimen (30) and an observation-state setting mechanism (31), (32) that sets, in a variable manner, an observation distance D and an observation angle θ of the fluoroscopy apparatus (100) relative to the standard specimen (30); and an observation-conditions adjusting portion (10) that adjusts observation conditions on the basis of the set observation distance D and observation angle θ and a reference image G1 and a fluorescence image G2 acquired by capturing the standard specimen (30) with the fluoroscopy apparatus (100).