An information processing system includes an image processing apparatus and a server device, the image processing apparatus including: a read controller that reads a recording medium on which a first image is formed and in which identifying information of the first image is embedded and generates a second image; a detector that detects the embedded identifying information from the second image; and a first transmitter that transmits the detected identifying information and the second image to the server device, the server device including: a storage that stores an image and identifying information of the image in association with each other; a determining unit that determines whether the transmitted identifying information is stored in the storage unit; and a storage controller that, when it is determined that the transmitted identifying information is stored in the storage unit, stores the transmitted second image in association with the stored identifying information.