The aim of this study is to study and achieve the oversight system of Islam and the Constitution of the IRI in the field of people's oversight of the government with an emphasis on the knowledge system of Nahj al-Balagheh and the articles of the IRI Constitution. This research is performed at the descriptive-analytical level with a library-based method. The author's studies showed that religious sources, especially Nahj al-Balaghah and also the IRI`s Constitution, consider public oversight in the Islamic political system inevitable and give it a special place and consider it as a necessary constructive and deterrent factor to protect the system from harm. And for this reason, awareness of the people and officials with the context of public oversight and fathfulness to it in practice, which introduces religious teachings and principles of the constitution as effective examples of oversight, protects society from deviations and harms.