Among Iranian rulers, Karim Khan Zand enjoyed some unique features that characterize him. He enjoyed a popular consent and gained power from this context. During his rule, he maintained a progressive government and lived like other people and regarded himself as the guardian of their rights. By adopting rational measures, Karim Khan provided relatively good welfare and security for all social classes. His measures caused preserving public order and security, and under his rule, people experienced relative welfare and social justice. Therefore the main question of this research is: What was Karim Khan's approach towards establishing public order and security in Iran? This article is prepared by historical method and the facts have been collected through library method and the findings have been analyzed by descriptive method. The findings indicate that a benevolent and honest breed of Iran demonstrated a unique instance of establishing public order and security. Pointing to some examples of Karim Khan's methods of enforcement may be used as a pattern even for contemporary authorities of Iran.