To provide a document data management system, an image forming apparatus, a document data managing method, and a program that enable any of a plurality of devices of a system comprising only the plurality of devices to obtain a flow of copy of document data.

The document data management system where the plurality of devices capable of managing document data are connected is characterized in that when one device transmits document data to another device, the transmission-side device and reception-side device record a history of the document data as header information to be added to the document data.