1. A printing system comprising a laboratory server for obtaining prints by carrying out printing of an image based on order information provided from a user for instructing printing of the image, the laboratory server having a laboratory database for storing the order information including information representing at least an image ID specifying the image to be printed and a requested quantity of the prints and added with an order ID for identifying the image ID and the requested quantity, and the laboratory server comprising correction means for changing the requested quantity of the prints in the order information stored in the laboratory database to an actual quantity of the prints.