A photo sharing system with a face recognition function is provided. The photo sharing system includes a photo browser and a photo sharing platform. The photo browser has a photo classification module for classifying plural photos according to face image contained in the plural photos, thereby generating a photo classification message. The photo classification message contains the photos having the face image of the same person. Moreover, the photo classification message may be transmitted to the photo sharing platform at the same time to be shared to the receiver corresponding to face image. By the photo sharing system, the efficacy of sharing photos will be enhanced.