An exposure machine includes a base portion, a port portion, and a conveying structure. The base portion includes a work table and a bearing frame. The bearing frame is disposed on the work table and is configured to carry a tray. The port portion is configured to serve as a feed port and a discharge port of the exposure machine. The conveying structure includes at least one upper arm, at least one lower arm, and a movable tray guide. The movable tray guide is connected to the base portion and the port portion. The at least one lower arm is provided with a hook configured to hook the tray and move the tray to the port portion.