The invention relates to an image processing system and method. The image processing system includes a reception unit that receives an image forming instruction from a user, a retaining unit that retains the image forming instruction in association with the user, an acceptance unit that accepts an execution instruction from the user, an authentication unit that performs authentication of the user, and an image forming unit that executes the image forming instruction retained by the retaining unit in association with the authenticated user without accepting an execution instruction by the acceptance unit in a case where the authentication unit completes the authentication.