Data managing method, data managing device and data managing server suitable for restricting distribution of data

In order to prevent invalid distribution of data, a data managing method includes the steps of inputting a document, extracting, from the input document, a document No. for identifying the document, receiving the input of a user ID for identifying a user, determining whether or not a process for the input document is permitted for the user identified by the acquired user ID by referring to permission data, and forbidding the execution of output processes for the input data in the case where it has been determined in the determining step that the process is not permitted. The permission data is data which associates, for each document No., user IDs with the process names for identifying processes permitted for the document.