This paper explores the mechanisms through which educational quality impacts economic growth, as well as the successful experiences and failures of different countries and regions in this regard. In the context of globalization and technological advancements, educational quality has become a key driver of economic growth. The paper first reviews theories such as human capital theory, new economic growth theory, and theories related to social mobility and inclusive growth, explaining how education contributes to economic growth by enhancing labor quality, promoting technological innovation and diffusion, improving health and demographic structures, and increasing social capital. Subsequently, through the analysis of successful cases from developing countries like China and failures arising from inadequate or poorly structured educational systems, the paper provides specific empirical evidence. Finally, the paper summarizes the critical role of educational quality in economic growth and offers corresponding policy recommendations, including investments in basic education, strengthening higher education and vocational training, and promoting educational equity, with the aim of helping countries around the world improve educational quality and foster sustainable economic growth.