Today, open education plays an important role in the lifelong education system. It is open education that gives adults the opportunity to study in the time available to them and receive formal and informal education. Open adult education is not only a tool for personal development, but also an important element of social progress, democracy and building a society, as well as a transforming economy. Ensuring access to quality adult education is essential for achieving sustainable economic development of the country and ensuring a decent quality of life for all citizens. Open education creates opportunities for adults to learn throughout their lives, which helps them change careers, increase their qualifications and keep up-to-date in today’s world. Countries with a high level of education of the population have advantages in high-tech industries, which helps to stimulate economic development and attract investment. Skills acquired through open education help adults find better jobs or increase their competitiveness in the labor market. Ensuring access to education for all sections of society helps reduce social disparities and ensure equal opportunities for all. As an innovative phenomenon, open education promotes the development of critical thinking and analytical skills, which allows adults to be more informed citizens and make informed choices. The opportunity to learn and develop helps adults realize their potential, find exciting new interests and achieve personal growth. Acquiring new knowledge and skills helps increase life satisfaction, improves well-being and psychological state, which affects the social indicators of countries. Adults with fresh knowledge and approaches can create new ideas, develop innovative projects and make a significant contribution to social progress. This article is devoted to determining the place of open education in the general system of lifelong education system and analyzing its effectiveness in Ukraine and some European countries. It was established that open education is the tool that gives adults the opportunity to acquire knowledge outside educational institutions and during extracurricular time, and also open education is a driver of human development as an employee, i.e. a part of the labor market and as a result stimulates the development of the country’s economy