A document data producing part produces document data in which first meta data is embedded based on a document template and a data source; a printing part prints the document data in a paper document; a scanning part obtains a scanned image from scanning the paper document after predetermined processing is carried out thereon after the printing, and obtains various sorts of information provided at the time of the scanning as second meta data; and a processing part carries out predetermined processing according to the paper document with reference to the document template, based on the first meta data obtained decoded from the scanned image and the second meta data obtained at the time of scanning.