Abstract: This article analyses the methodological grounds of neopositivist concept of Herbert Hart that found reflection in early works of the legal philosopher. Hart’s criticism of the doctrine of logical-philosophical analysis of language allowed forming a new method of philosophical definitions of the social terms based on understanding of contextuality and relativity of verbal expressions. Linguophilosophical theory of legal language, formulated in Hart’s works, determined the theoretical-legal views of the scholar being translated into his fundamental work “The Concept Of Law”, which significantly influenced he establishment of the school of analytical jurisprudence. Having analyzed the early works of Herbert Hat, the author was able to formulate a method of philosophical definition of the social terms that comprised the foundation of his philosophical and theoretical-legal methodology. At the same time, the scholar does not create a holistic methodology and meaningful concept of legal language, being limited by the questions of peculiarity of the use of legal language and specificity of the analysis of legal concepts. Hart’s application of knowledge in the area of linguistic philosophy took the form of analytical tradition in jurisprudence. The acquired results are of great importance for the development of legal theory and philosophy of law, because allow more precisely determining the grounds of the neopositivist concept of law of Herbert Hart – one of the leading philosophers of law of the previous century, whose works are relatively unknown in Russia.