The aim of the research was to analyze the latest values of the EU in the context of their adaptation in the process of state-building in the candidate countries for enlargement with a view to reforming the legal field of the States. The main method was the observation method as a component of the experimental procedure with subsequent interpretation of the results (description). The results of the study demonstrate the axiological importance of the EU’s main values. At the same time, the need for a gradual implementation of reforms in the sphere of state-building is argued, given the desirability of preserving national identity. It is concluded that the low level of adaptation of the EU pyramid of core values is corroborated and confirmed by statistical data, which requires a qualitative transformation of the reform strategy of the state-building processes of the candidate countries for EU enlargement. Scientific research was concerned with the search for the optimal and effective concepts of the integrated application of European values in the state-building processes in the candidate countries for EU enlargement.