It is of great significance to reinterpret the concept of"legal system"in response to the specific issues in the application of the concept in current academic and practical circles in China,otherwise it will easily lead to deviation in the understanding and application of the concept,thereby hindering the formation and promotion of effective discussion.The legal system and the department laws are inseparable.The former is an organic whole composed of the latter.Therefore,the division of the department laws is an important part of the legal system.The traditional criteria for dividing departmental laws are the objects and methods of adjustment,but the mod-em development of the legal system has challenged this classic paradigm.Therefore,it is necessary to reflect on the essential composition of legal concepts.The essential elements of the legal system include legal norms,practical application and legal dogma,which have different functions and roles in shaping the concept of"legal system".Among them,legal norms are the basic conceptual factor,practical application is the effective material of the legal system,and legal dogma is the theoretical tool for the final presentation of the legal system,so the legal system has the internal and external conceptual inevitability.In terms of the definition of specific con-cepts,we can comprehensively analyze the concept of"legal system"from three perspectives:power structure,temporal and spatial logic and practical application.