1. A user interface screen creation supporting system comprising: a signage apparatus configured to be set in a place where a plurality of guests visit, and to display a user interface screen operable by a guest of the plurality of guests, and to capture an image of the guest; a terminal configured to be operated by the guest, and to display a design template for supporting creation of the user interface screen by using a web browser; and a server configured to acquire the image of the guest from the signage apparatus and to select, on the basis of the image of the guest, out of a plurality of template groups stored in a predetermined storage region in advance, a design template and to provide the design template selected to the terminal, and to provide the user interface screen edited by using the design template, wherein the design template comprises contents areas that are different in the array position or the number of the contents areas per the design template, and a representative image and a detailed data can be set in a contents area of the contents areas, and the signage apparatus displays the representative image on the contents area and a cursor indicating the representative image selected by a user by using the terminal, and the terminal accepts the selection of the representative image and displays the detailed data corresponding to the representative image selected.