Administrative law is a branch of public law that legitimises government authority. It ensures government bodies are acting fairly and legally. This study illustrates the most predominant factors that influenced the development of administrative law. Through a library research approach, the study explains that administrative law has been developed through four paths: administrative procedures, constitutionalising, adjudication, and statutory. formation of administrative procedures influenced the subsequent development of administrative law. To ensure the government actions are legal and accountable, the administrative law is constitutionalised through the constitutional guidelines and judicial review. Judicial review referred to the court procedure that examines the legality of judgements and actions of public entities to ensure they follow their procedures and administrative law regulating the actions and powers of those public entities. Statutory law is the law that is enacted by the legislative branch, and administrative law regulates the actions of public agencies and enforces the statutes. Development of administrative law resulted in the separation of power in modern states. Alongside the four tracks, administrative law development in Afghanistan has been influenced by quick regime changes from the Democratic Republic of Afghanistan (1980 to 1987), which was a secular and Marxist-style regime, to Mujahidin and Taliban regimes which proclaimed themselves as pure Islamic states.