One of the most important methodology of textual study as a basis for religion study is historical criticism which was formed regarding the Bible about 18th century.One of the books that Protestants took into most consideration, was the book of Job.Trying for reconstruction of past realities, free from influence of any dogma, theological thoughts or traditional interpretations, shows that these books, including the book of Job, aren’t compositional but really redactional, i.e. several authors or editors were involved in compiling, revising & manipulating in some different periods.Regarding historical criticism steps, this research deals to source, form & redation criticism & by this complicated editorial process we find that past dispersed Hebrew traditions as smaller pericopes opened their way gradually to greater periscopes in canon.Thus it is said that interpretation & understanding of Jewish literature is as Jewish history.