A fundus imaging system configured to scan a retina of a subject with a light beam, the fundus imaging system comprising: a reflection mirror configured to reflect a light beam incident on the reflection mirror after passing through a first focus so as to cause the light beam to pass through a second focus; a detecting unit configured to detect a light beam reflected off the retina; a compensating unit, characterized by further comprising: a two-dimensional scanning unit that is disposed at a position that coincides with a position of the first focus of the reflection mirror and that is configured to reflect a light beam incident on the two-dimensional scanning unit so as to perform scanning with the light beam in two-dimensional directions, wherein the compensating unit is configured to correct a detection result of an intensity of the light beam detected by the detecting unit, based on at least one of a scan angle or a scan timing at which the two-dimensional scanning unit performs scanning, so as to compensate for illuminance non-uniformity of a light beam illuminating the retina, the illuminance non-uniformity resulting from an unevenness of a ratio of an angular change of a light beam emitted from the first focus during scanning of the two-dimensional scanning unit to an angular change of a light beam incident on the second focus after being reflected by the reflection mirror. a reflection mirror configured to reflect a light beam incident on the reflection mirror after passing through a first focus so as to cause the light beam to pass through a second focus; a detecting unit configured to detect a light beam reflected off the retina; a compensating unit, characterized by further comprising: a two-dimensional scanning unit that is disposed at a position that coincides with a position of the first focus of the reflection mirror and that is configured to reflect a light beam incident on the two-dimensional scanning unit so as to perform scanning with the light beam in two-dimensional directions, wherein the compensating unit is configured to correct a detection result of an intensity of the light beam detected by the detecting unit, based on at least one of a scan angle or a scan timing at which the two-dimensional scanning unit performs scanning, so as to compensate for illuminance non-uniformity of a light beam illuminating the retina, the illuminance non-uniformity resulting from an unevenness of a ratio of an angular change of a light beam emitted from the first focus during scanning of the two-dimensional scanning unit to an angular change of a light beam incident on the second focus after being reflected by the reflection mirror. a two-dimensional scanning unit that is disposed at a position that coincides with a position of the first focus of the reflection mirror and that is configured to reflect a light beam incident on the two-dimensional scanning unit so as to perform scanning with the light beam in two-dimensional directions, wherein the compensating unit is configured to correct a detection result of an intensity of the light beam detected by the detecting unit, based on at least one of a scan angle or a scan timing at which the two-dimensional scanning unit performs scanning, so as to compensate for illuminance non-uniformity of a light beam illuminating the retina, the illuminance non-uniformity resulting from an unevenness of a ratio of an angular change of a light beam emitted from the first focus during scanning of the two-dimensional scanning unit to an angular change of a light beam incident on the second focus after being reflected by the reflection mirror.