A fundus camera includes an eyeball-offset detection device and an annular illumination device. The eyeball-offset detection device is configured to detect an offset vector of a lens of the fundus camera relative to an inspected eyeball. The annular illumination device includes a plurality of illumination elements that are arranged in a ring shape around an optical axis of an imaging system of the fundus camera. According to the offset vector of the lens relative to the inspected eyeball, the fundus camera selectively activates one or more illumination elements at corresponding positions to keep an illumination optical path away from a center area of the pupil of the inspected eyeball to reduce effects of corneal reflection and improve illumination quality. Therefore, the abovementioned fundus camera has a large operable range.