循環設計是循環經濟的核心，強調產品生命週期該具有再生的重要性，能夠反復修復、再利用、回收或改造。隨著邁向淨零碳排成為國際目標，循環設計的重要性變得更加突出，設計與營造的建築思維必須有所改變。通過拓撲互鎖（Topological Interlocking）這個設計原則，建築單元通過單元幾何形狀與排列方式由其相鄰單元提供約束定位，就有機會避免在建築尺度上過度依賴水泥砂漿等粘合劑。減少在組裝時的粘合劑用量，意味著建築單元可以在需要時拆卸並在其他建築項目中重複使用，從而產生符合循環設計核心理念的建築產品。在本文中，介紹了一系列拓撲互鎖（TI）系統及其在建築循環經濟方面的潛力，並提出了在建築以租代買的想法。

Circular design is the heart of a circular economy, it emphasizes the importance of designing products to have a regenerative life cycle, being able to be repeatedly repaired, reused, recycled, or transformed. As circular design becomes more prominent in our societal goal of reaching carbon neutrality, the mindset in which we design and build architectural and civil projects has to start to change. By utilizing topological interlocking (TI), a design principle where an element is locked in place by the kinematic constraints provided by its adjacent elements by the element geometry and mutual arrangement, we are relieved of our reliance on binders to build at architectural scales. The possibility of assembly without binders means the elements of the built structure can be disassembled and reused on other projects when required, resulting in an architectural product that matches the core philosophies of circular design. In this paper, a selection of TI systems are presented alongside their potential pertaining to the circular economy in architecture, and the idea of rentable architectural elements is proposed.