Generation method and generation system of PDF (Portable Document Format) documents

The invention provides a generation method and a generation system of PDF (Portable Document Format) documents. The generation method comprises the following steps of: presetting PDF dimension information on a document page to be processed and providing the document page with the set PDF dimension information; shooting the document page to be processed to obtain an image containing the document page; looking up a PDF dimension information mark in the shot image and analyzing the PDF dimension information mark to obtain the PDF dimension information expressed by the PDF dimension information mark; generating the image to a PDF document according to the obtained PDF dimension information; and the dimension of the PDF document corresponds to the PDF dimension information. Compared with the prior art, the generation method provided by the invention both simply, conveniently and automatically judges the PDF dimension and overcomes the troublesome operation of manually setting the PDF dimension, and meanwhile guaranteeing the dimension of the generated PDF document to be uniform with the dimension of the shot document page so as to provide convenience for shooting the document and generating PDF for people.