To provide a document management method and device, safely and efficiently operating a document.

Bar code information necessary for login to a server computer or a plurality of computer terminals is stored as a bar code aside from the document management device. The bar code information is read at the time of the login, and key information is produced from the bar code information and secret information inside the device, and is transmitted. After the login to the server computer or the plurality of computer terminals, a path (a route) to a storage place of an application file, a data file or a Web document is printed on a label or the document as the bar code. At the time of calling, the path is read, and the application file, the data file or the Web document is called onto the computer terminal from the path (the route) to the storage place. After logoff, the bar code information necessary for login to a plurality of key devices is stored as a bar code aside from the document management device, and the key information is produced and transmitted when storing the printed document into a library or the like.