It is the fundamental requirements to realize substantive legal justice and social justice to protect and remedy social vulnerable groups, and it is a key factor in the framing of a harmonious society.

On Legal Justice of the Third Type of Norm;

Ancient thinkers demonstrated that human justice logos was natural law, and positive law should possess all qualities of natural law from the point of view of natural law, so the basic proposition about legal justice springs from natural human logos was established.

This process can be divided into three stages: natural justice period; legal justice period and constitutional justice period.

Formal justice and substantive justice are the values of rights and obligation distribution in modern and contemporary law respectively.

We compare the value of Economic Law with that of Law, Civil Law and Administrative Law in order to find that the value orientation of Economic Law is pursue substantive justice, social benefit and harmony of economic freedom and order.

In the postmetaphysical society, the criteria of substantive justice are challenged because of the ruin of the traditional metaphysics, which is the starting point of reflection on justice.

Protecting disadvantageous persons has become one of the trends in legislation in private international law,which reflects that the aim the private international law pursues has transferred from "formal justice" to "substantial justice".

In this article, the author tries to analyze the substantial justice, social efficiency, economic security and balance of economic law to indicate the value difference between economic law and civil law.

Despite the different situations, the substantial justice of tax law demands the formulation and implementation of tax law should have adequate consideration of the difference in tax payers income level, social status and their financial burden.