1. A numerical analysis data creating method for creating numerical analysis data that are obtained by analyzing an analyzing target, comprising: a judging step judging whether or not to create the numerical analysis data of the analyzing target using data that have been stored in a database part; a searching step searching the database part based on information related to the analyzing target and displaying a search result, if the numerical analysis data of the analyzing target are to be created using the stored data; and a creating step creating and storing in the database part the numerical analysis data of the analyzing target by modifying usable data if necessary, when the usable data exist in the search result, wherein the data that have been stored in the database part include numerical analysis data, analysis model data, material characteristic data and attribute data with respect to targets that have been analyzed.