To improve convenience when accessing and acquiring cited information carried in a document.

The document management system includes: an address extraction means 1061 for extracting address information from first document data; a two-dimensional code conversion means 1062 for converting origin information including the address information to a two-dimensional code; a document data generation means 1063 for generating second document data by incorporating the two-dimensional code in the document data; a two-dimensional code output part 209 for outputting the document on the basis of the second document data; a two-dimensional code extraction means 2101 for reading the second document data and extracting the two-dimensional code; a decoding means 2102 for decoding the extracted two-dimensional code and acquiring the address information; a document file extraction means 2111 for extracting a document file corresponding to the address information obtained by the decoding means 2102; and a document output means 2112 for outputting the document on the basis of the extracted document file.