Presidents speeches or states official representatives in the General Assembly of the United Nations, considered as official stance of the government's foreign policy. In this paper, I have tried to explore the dominant pattern of four speeches of Iran’s presidents at the General Assembly of the United Nations. The emphasis of each of these individuals on specific topics indicating the importance of a particular pattern. In other words, to demonstrate the impact of items that representing in each lecture and by identifying the characteristics of the categories enumerated in the text of the speech can be found that speech pattern, these indices are in fact evidence in the text. The words and concepts are extracted from each of the four texts and then grouped into more general categories and evaluated the efficacy of indexes’ concepts and terms on each president’s speech. Furthermore, classification and shown the indexes concepts and words and their effects in the form of tables and graphs. So that it could be implemented this data in other studies. Reductionist and quantitative analysis of these data will help us answer those questions.
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