The Islamic world has faced numerous challenges and issues throughout history and in contemporary times. One of the most important of these challenges is the issue of countries’ interference in each other’s internal affairs, which is divided into two categories in terms of purpose: intervention with humanitarian motives and intervention with power-based goals. The first category is considered legitimate and legal, while the second category is illegitimate and contrary to legal standards. This research examines legitimate intervention using the analytical-descriptive method and citing verses of the Holy Quran and the principles of international law. The research findings are that from the perspective of the Quran, intervention in the internal affairs of another country is legitimate only if it is aimed at realizing human values such as jihad, legitimate defense, rescuing the oppressed, supporting the oppressed, and protecting the rights of citizens. In the international legal system, intervention is only permitted in two forms: self-defense in accordance with Article 51 of the United Nations Charter and action with the authorization of the Security Council. Studies also show that legitimate intervention meets conditions such as pure intention, legal method, sublime goal, protection of human life and rights, countering military aggression, and adherence to human dignity, and must be carried out based on the teachings of jihad, enjoining good and forbidding evil, or within the framework of self-defense and Security Council resolutions.