Background. The paper is devoted to the development of a new approach to the study of a person's well/ill-being. Changes in economy, politics and geopolitics, social sphere in Russia and the entire world have resulted in emerging features of modern life that significantly affect the well-being of a person. In this regard, psychology interest in this issue is rising. In Western psychology, two theoretical constructs of "subjective well-being" and "psychological well-being" are clearly differentiated, and the toolkit to correspond each construct is created. However, in the national psychological science, there is a variety of terms with borrowed foreign psychodiagnostical tools.

The Objective of this research is to develop a concept of emotional well-being of a person based on the integration of existing foreign and national psychology approaches to the study of well-being within a new theoretical construct and structural model, and also transforming the models in the research tool and its empirical verification.

The paper considers emotional well-being of a person as an entire existential condition of harmony between the inner and outer world, initiated throughout the living process, activity and communication of a human.

Design. Conducting a pilot study based on the sample of 117 subjects and the analysis of reference literature allowed to build the theoretical construct of "emotional well-being of a person" that includes nine parameters: the three of them include the positive emotional component of well-being, other three ones include positive personal component of well-being, and three components indicate ill-being. These parameters lie in the basis of the research methods for self-evaluation of emotional well-being" (SEEWB) carried out using the sample of 2,229 subjects.

Conclusion. The cluster analysis identified and described groups of respondents in terms of self-evaluation of emotional well-being. The results obtained can be used both in research and in practical activities of a psychologist for diagnosing and optimizing the level of emotional and personal well-being.