Legal philosophy is a branch of philosophy that explores philosophical questions related to law. Legal philosophy tries to understand the nature, purpose, and moral foundations of legal systems and legal concepts. In this sense, philosophy law opens space for in-depth consideration of the essence of law, the moral principles that underlie it, and its social and political implications.

According to Satjipto Rahardjo, legal philosophy questions the fundamental questions of law. In line with this, Mahadi said that legal philosophy is a philosophy that discusses something in the field of law in depth to its roots.

Therefore, legal philosophy can be formulated as a view of metaphysical problems and values, not related to the technical elements of law, and starting from a meta-juridical point of view, aiming to understand law comprehensively and completely.

The position of philosophy law as a branch of philosophy is more on the analysis and understanding of the philosophical concepts underlying law, rather than providing concrete legal guidelines or rules. Legal philosophy involves the analysis of fundamental legal concepts, such as justice, freedom, responsibility, and human rights.

Legal philosophical thought tries to answer abstract questions such as,"Is the law fair?" or "What is the purpose of the legal system?" In addition, legal philosophy also discusses the relationship between law and morality. Questions like "Does the law always reflect morality?" or "How can law influence moral behavior? become part of the study of legal philosophy.

Thus, Legal Philosophy is a special philosophy that underlies legal science, which includes ontological, epistemological and axiological aspects. Legal Philosophy is a branch of Ethics Philosophy that studies law philosophically, where “Law” as the object is studied in depth to the basic core, or to its roots, which is called “the essence of law”.

An introduction to the philosophy of law is an effort to understand and detail the philosophical foundations underlying a society's legal system. In this context, axiology, ontology, and epistemology become key concepts that form the foundation of legal philosophy.

Axiology is a branch of philosophy that studies the values, goals, and ethics behind the law, discussing rights and justice. Meanwhile, Ontology is the nature or reality that underlies the existence of law, explaining whether law is objective or subjective.

Meanwhile, epistemology deals with the source of legal knowledge and how we understand and acquire knowledge about law.

An introduction to these three concepts allows for a deeper understanding of the philosophical aspects that form the legal structure and provides a basis for the development of relevant and sustainable legal theories.