30. A document administration system comprising: a document administration information storage section that stores administration information containing at least document identification information assigned to a document and a retention period of the document; an identification information reader that reads, from the document, the document identification information assigned to the document; a determination section that determines as to whether or not the retention period of the document has expired, based on the document identification information read by the identification information reader; a document reader that reads the document to acquire an image of the document if the document meets a predetermined read condition; a document destruction member; and a controller that controls the document destruction member to destroy the document if the document meets a predetermined destruction condition.
30. A document administration system comprising: a document administration information storage section that stores administration information containing at least document identification information assigned to a document and a retention period of the document; an identification information reader that reads, from the document, the document identification information assigned to the document; a determination section that determines as to whether or not the retention period of the document has expired, based on the document identification information read by the identification information reader; a document reader that reads the document to acquire an image of the document if the document meets a predetermined read condition; a document destruction member; and a controller that controls the document destruction member to destroy the document if the document meets a predetermined destruction condition. 33. The system according to claim 30 , wherein the predetermined read condition includes a condition that the retention period of the document has not yet expired.