The problem of ethics is acute in the modern Ukraine.Its relevance is due to the general level of our society, the low level of social responsibility for what is done in society in all its spheres and what society does. We come across misunderstandings, disrespect for ethics all the time in the process of our lives. Higher education also does not pay due attention to the formation of professional ethics of future professionals. The relevance of the topic is due to the need of Ukrainian society for social workers with a high level of professional ethics and responsibility for performing professional duties and solving complex life problems of the social sphere, as well as updating the search for an effective pedagogical system of professional and ethical competence of future social workers. The aim of the article is a scientific reasoning and experimental verification of the effectiveness of the pedagogical system of formation of professional and ethical competence of future specialists in the social sphere to improve the quality of their professional training. The following research methods are used in the article: logical-structural analysis – to determine the essence and structure of the concept: «professional and ethical competence of future professionals in the social sphere»; structural-systematic analysis – to ensure the complexity of reasoning of the concept and structure of the pedagogical system of formation of professional and ethical competence; modeling – to develop a model for the formation of professional and ethical competence of future professionals in the social sphere; questionnaire-diagnostic methods (questionnaires, testing, interviews, diagnostics) – to establish the effectiveness of the pedagogical system of formation of professional and ethical competence of future specialists in the social sphere. As a result of our research, a pedagogical system of formation of professional and ethical competence of future social specialists was developed and experimentally tested that its effectiveness is ensured by the principles of systemic, humanistic, deontological, axiological, acmeological, personal-activity, subject-subject, competence, andragogical approaches, specific principles, pedagogical conditions and factors. It was based on the author's concept of formation of professional and ethical competence and a model aimed at the formation of moral and ethical values, professional and ethical knowledge, skills and personal-moral and professionally important qualities during training was designed. The obtained results allow us to state that the diagnosis of professional and ethical competence was carried out at the ascertaining and formative stages of the experiment, gave us the opportunity to compare the levels of professional ethics of students of the studied groups and draw conclusions about the effectiveness of the proposed author’s pedagogical system.