We have understood that school curriculum should be designed and implemented by deep learn ing and authentic understanding. So, How can we approach these aims in curriculum development? This article intends to study the integration of competence-based education and understanding by design. These two elements have been studied separately in recent studies. Findings indicate that the educational values and positions of both sides are very similar. Competence-based education is focused on developing the abilities to abandon fragmented knowledge education and the way to understand the content and therefor perform better. It further focuses on enduring understanding. This study is based on the above and explores the integration methods of both. Competence-based education aims to improve the uselessness of invaluable knowledge which is not useful in the context of memorization and acquisition of the expression and the relevant experience and practice, either. It has a lot of things in common with understanding by design which emphasizes the enduring understanding of learners, especially the ways to build a curriculum and manage it. In this study, we have explored the integration methods setting importance on the backward design. Integration of competency-based education with UbD is discussed by two lines within curriculum development. First, competency and understanding as educational aims, contents, teaching method, evaluation can be integrated by key competency and authentic understanding. Second, we may teach competency itself as content in instructional settings. In the future we should study the approach to authentic integration of the two.