A communication terminal uses a Web printing function to print a Web page of a URL designated through an operation panel, together with the URL of the Web page and an entry column for entering keywords, on a sheet of paper. When an image is read from the sheet of paper, the communication terminal specifies contents written in a specific position. When any URL is contained in the contents and any keyword is specified together with the URL, the communication terminal registers the URL and the keyword associatively in a data table. After that, a user can make the communication terminal print the Web page of the designated URL by designating the URL registered in the data table on the basis of the keyword corresponding to the URL.