A data authoring device sets predetermined relevant information for an information presenting apparatus which outputs the predetermined relevant information by use of spatial orientation information meant by an object of the real world and/or a previously decided marker with respect to the object and/or the marker. A spatial orientation information input section inputs the spatial orientation information of the object and/or the previously decided marker. A relevant information setting section sets a method of displaying the predetermined relevant information. A spatial orientation information display section displays the spatial orientation information of the object and/or the previously decided marker input, and displays the predetermined relevant information in accordance with the displaying method. A data output section outputs data describing display setting of the display by the spatial orientation information display section.