1. A setting information creating method for creating setting information of a specific component written in a specific language of said specific component based on a group of rules, said group of rules being setting information of components of an information system written in natural language, the method comprising: a language conversion step of converting said group of rules written in natural language into a predetermined interface language; and a creation step of creating said setting information of said specific component based on said group of rules converted into said predetermined interface language.