A camera system has: cameras; and an information-processing device connected through a communication network with the cameras, which acquires a shot image from the cameras. Each camera includes: an image-pickup part taking an image of a subject; and an image-pickup synchronizing part mutually synchronizing an image-pickup timing of the camera with an image-pickup timing of another camera. The information-processing device includes: a synchronous shot image-acquiring part acquiring shot images taken by the cameras at a common timing from the cameras; an image-evaluating part evaluating the condition of the subject in the shot image for each of the shot images taken at a common timing acquired by the synchronous shot image-acquiring part based on predetermined evaluation criteria to assign an evaluation value to each shot image; a prioritizing part assigning a priority to each shot image according to the evaluation value assigned to each shot image by the image-evaluating part; and a display control part making a display device display the shot images according to priorities assigned to the shot images by the prioritizing part.