Abstract: A file management system according to the present invention includes a server apparatus and a client apparatus. The server apparatus includes a file server, a file information database, an authority database, and a server-side communication section for sending a file and access authority information to the client apparatus. The client apparatus includes a client-side communication section, an application program for making a user utilize the file received by the client-side communication section, and an application controlling section for restricting a function of an application capable of being utilized by the user based on the access authority information received by the client-side communication section when the user utilizes the file received by the client-side communication section.