The words of Imam Ali (AS) in Nahj al-Balagheh have always been distinguished from other texts due to two basic characteristics; One is eloquence and rhetoric, and the other is its multidimensionality in the sense that the words have appeared in different and possibly contradictory semantic fields, and at the same time, eloquence and rhetoric have been maintained. An example of the intersection of these two characteristics can be seen in the application of irony. What is most noticeable in this system is the juxtaposition of two contrasting semantic-verbal elements to surprise the audience and at the same time convey a bitter message with humorous literature. In this article, by identifying examples of the manifestation of the Iranian rhetorical industry in the sermons of Nahj al-Balagheh and their conceptual analysis, another manifestation of the verbal and semantic miracles of Imam Ali (as) speech is considered and another literary industry used in Nahj al-Balagheh is re-read. Findings showed that in the words of Imam Ali (AS), irony is used covertly, by combining contradictory and unexpected topics and exaggeration in preferring worthless topics and vice versa, and is used with striking sentences and divination so as to convey many important concepts to the audience through humorous literature.