A service execution device which includes a user identification information memory, an account identification information memory, a service execution section and an aggregation section. The user identification information memory stores user identification information for identifying users. The account identification information memory stores account identification information, which is associated with the user identification information and identifies accounts. The service execution section executes services in accordance with instructions from users for whom account identification information corresponding to user identification information is present and who are identified by this user identification information. The services are processes relating to document data. The aggregation section aggregates results of execution by the service execution section for each account of the account identification information.