A document generation apparatus comprises: a first acquisition unit adapted to acquire, based on identification information appended to a first document, layout data and data acquisition information required to acquire data to be laid out in accordance with the layout data; a second acquisition unit adapted to acquire data based on the data acquisition information acquired by the first acquisition unit; and a generation unit adapted to generate a second document on which the data acquired by the second acquisition unit are laid out in accordance with the layout data acquired by the first acquisition unit.