A good education has never been more important than it is today. This is true for the individual, and it is true for our society. Concepts like quality development and quality assurance have entered modern education. The European Union adopted the quality concept in general and vocational education to strengthen the economic development in Europe. To tackle this aspect, education conferences are organised on a regular basis since 2000 and address measures in the areas of quality development and quality assurance. In this context, instruments like the European Qualifications Framework and the European Credit System for Vocational Education and Training have been developed and aim to make qualifications more transparent and comparable. In Austria, a network for the quality of vocational education, the so-called “Qualitätsnetzwerk für Berufsbildung”, was established as early as in 1995 and led to the initiative “QualitätsInitiativeBerufsBildung (QIBB)” that is designed to systematically improve the quality of Austrian vocational schools. In Switzerland, the 1996 initiative “Modell Q2E Qualität durch Evaluation und Entwicklung” laid the cornerstone for quality evaluation and development of schools at the upper secondary education level. Germany has also introduced the quality concept in vocational education quite early, systems, however, vary from federal state to federal state. This study will discuss the QmbS of Bavria and the QM-system in Lower Saxony. All quality management systems for schools do not only focus on individual teaching units but also the school as a whole. This diploma thesis casts light on quality assurance and quality development in school education at the European level. Moreover, it gives insights into how the European Union implements this approach and the instruments used, also by taking a closer look at its implementation in Austria, Germany and Switzerland.