The need to start a research on self evaluation of the work quality of school librarians arose from the need to change the current status quo in validation of the profession, and the need to follow the direction and the intensity of the existing changes. The dissertation will determine the existence of the elements of self evaluation in the work quality of school librarians, discuss the possible application of self evaluation in professional work, adequate to the librarian profession, based on a hypothesis model. This process, through realistic and methodologically clearly defined self analysis, should enable the librarian profession to recognize their developmental needs and act towards advancement of their working practice. There are three objectives: the first one combines knowledge and social interaction in the profession through exploration of social, sociological and cultural interaction; the second one is to eliminate wrong common beliefs through work quality indicators and interdisciplinary approach; the third objective is to start the transformation of the current perception of the profession. The expected scientific contribution is the theoretical and hypothetical model for advancement of the work quality and profession evaluation. No other similar research has been conducted so far. The empirical part of the research is based on the study of the entity number of school librarians. By analyzing literature on the models of self evaluation and validation in educational and library science, the research shows the lack of models of (self) evaluation in the work of school librarians, while on the other side it also explores the theoretical justification of the suggested hypothetical model. The analysis of collected data is presented through realistic graph descriptions, the research problem is clarified as a social phenomenon, and one can draw the conclusion there is a need for implementing work validation, furthering the technological work conditions, as well as introducing specialized education for school librarians. The dissertation tackles two scientific disciplines: the educational and the library and information science, and it is therefore interdisciplinary. Self evaluation of work quality may contribute to the advancement of the social process of the professionalization of school librarians, determining the direction of change: It could be achieved by either adopting attributes of other professions or by anticipating a distinctive development of the professional identity through encouragement of the culture of evaluation and validation and the profession’s interdisciplinarity.