To provide an image forming system in network environment with improved security by improving accuracy of user authentication, and performing user management as a system by enriching processing on the basis of authentication result.

This image forming system is consisted by connecting via a network an image forming apparatus having an image reading means reading images from a document and acquiring image data, an image forming means forming an image on a sheet basing on the image data and a first image processing means performing image processing of the image data, a first information processor having a user authentication means authenticating a user when the user uses the image forming system, and a second information processor having a second image processing means performing image processing on the image data. The first information processor furthermore has a database for distribution destination corelating each user with the distribution destination.