One of the most adjectival Phrases of the Holy Qur'an is "work righteousness." What is God's word about this statement? The commentators have used various methods to achieve their answer. In this research, structural semantics method has been used. The purpose of this article is to show the meaning of "work righteousness" and achieve its meaning. Hence, first, on the basis of historical semantics, its etymology was examined and then on the basis of structural semantics, the semantic circles of "work righteousness" with respect to the semantic fields of their respective words: good(khier), good(hasan) and the good(ma'ruf) And its mutual terms: false, debauchery and corruption have been analyzed. The author, while accepting the emphasis on the well-known definition of "work righteousness", namely, the gathering of the good act and good acting in one act, emphasizes on the role of determining the "leader" and "wisdom" and its relation to the "purpose" of action, and on the semantics of faith, sincerity , The continuity and repetition, the breadth, proportion and factor of time and personality in the semantics of the "work righteousness", and has counted degrees for "work righteousness".