1. An image creating apparatus for creating computer graphics of an animation from text, comprising: an inputter that inputs various information including a text string; a displayer that displays various information; a material data storage that stores, as material data, character data, action data and set data for creating the computer graphics; a correspondence table storage that stores a text string/material correspondence table that associates the material data with text strings that show material names for the material data; a searcher that, when a partial text string that designates a feature of the material data is inputted from the inputter, newly searches for material data corresponding to the input feature, using a database located outside the image creating apparatus that stores the material data, and a hierarchical structural description that describes the feature of the material data in a hierarchical structure; a registrationer that stores the newly searched material data in the material data storage and registers a correspondence of the newly searched material data and a material name of the newly searched material data in the text string/material correspondence table; and a text string/CG conversion processor that, when a text string that designates a material name is inputted by the inputter, refers to the text string/material correspondence table, searches for a material name with which the input text string partially matches, acquires material data corresponding to the searched material name, and creates the computer graphics of the animation using the acquired material data.