a document managing system is provided with a plurality of document managing apparatuses each configured to retrieve a document stored in a storage according to a document id and to judge whether or not an operation with respect to the retrieved document is possible according to a user id that is generated with respect to each document managing apparatus , and a user id generating apparatus provided externally to the document managing apparatuses and configured to generate a common user id that is used in common among each of the document managing apparatuses . each document managing apparatus has an expert and import part configured to export and import data of an arbitrary document and an access control list .