由於地區發展受限於當地自然條件，使企業採取全球分工和延長供應鏈的策略，大量開採和獲取其他區域的自然資源，創造經濟繁榮的同時，也使生產資源不斷向價值鏈末端流動，成為廢棄物。循環經濟的概念為整合環境生態學、經濟學和運籌學等領域知識，重新定義和發揮廢棄物的價值，但也因領域和地區之間的條件差異，各研究的核心重點，以及對循環經濟的理解不盡相同。故本研究目的為自循環經濟這個跨學科和跨議題的研究中，探討其整體知識發展，進而分析不同領域和區域間關注的議題差異，並理清影響其知識發展之關鍵。
為了解循環經濟的發展，本研究自Web of Science核心資料庫蒐集4,121篇相關文獻，並輔以OECD資料庫之區域數據，使用關鍵延伸主路徑分析方法，歸納循環經濟的主流見解，並從科學技術和社會科學的角度剖析循環經濟關鍵議題的異同，再結合迴歸分析探討影響循環經濟研究的重要因素。
循環經濟的雛形始於將生態循環的概念應用於工業製造，而企業藉由與鄰近工廠交換廢棄資源來節省成本。近年，循環經濟的研究在產業生態學及共生策略的基礎下，不僅追求經濟及環境利益的最大化，亦成為拓展社會及文化意識，驅動創新的手段。科技技術研究者聚焦於如何藉物質循環系統進行優良的設計，達成環境和產業發展的平衡，反觀在社會科學領域則從政策和組織管理角度，強調以政策法規為驅動力，促使其產業運用物質循環共創商機，進而改變社會傳統的消費型態。
除產業生態學和產業共生對循環境濟研究的影響頗深外，環境科學與生態學領域以環境維護的角度出發，參考多種學科的知識方法，不僅供商業與經濟學和運籌學等各領域學者不同的研究視角，更推動循環經濟的知識整合與發展，使近年運籌學領域之研究開始納入環境和政策因素等考量，進一步優化循環供應鏈和逆向物流的相關資源決策模型。
此外，雖經貿強勢的區域能給予學者們較為豐富的研究素材和資源，但長遠來說，循環經濟研究的發展，仍取決於能使區域資源效率提升之方法和見解。例如，知識主要發展脈絡中，高度工業依賴的地區，多著重於資源轉換和再利用等，改善工業工程領域的資源使用效率，而歐洲地域則聚焦於環境科學和商業管理學科，學術發展均衡，為當地循環創新和循環商業模式等跨領域議題帶來研究優勢，成為許多後進國家改善區域環境、社會和經濟問題所效法的對象。

When facing the challenges of limited nature resources, companies generally extend their business and supply chain globally to access cheap raw materials and human resources in different areas. In the classical linear economic transformation, natural resources turn to waste continuously through reckless production and consumption, then causes different level of environmental trouble in nature depletion and pollution. The concept of circular economy starts to get attention from scholars in different disciplines, e.g. environmental science, economics, and operating research to convert waste to value. To have a holist understanding in circular economy, this study aims to observe the multidisciplinary scientific studies, (1) explain the knowledge development; (2) identify the differences appears in different scientific fields and locations; then (3) explore critical factors in diffusion of knowledge.
In order to distinguish from different research field in circular economy, this paper totally collects 4,121 relevant article and review papers from WoS database, and understands region basic situation from OECD database. By key-route main path analysis, we identify the main topics in different periods, show the contribution of certain research in scientific fields and regions and figure out several key research factors to advance scholar studies.
The main path results show that the concept of circular economy is based on industry ecology and industrial symbiosis, mainly showing one using another department’s waste as material to decrease operating costs and offer mutual benefit. In recent decade, researchers explain that circular economy not only operates as the solution to create financial advantage and solve local environmental issue, but drives circular innovation and improves society. Scientists, from technological view, devoted on benefit both environment and economics by designing material system, whereas the scholars in social science considered circular economy as the opportunity for innovation investment and profit making.
Besides the domains of industry ecology and industrial symbiosis, the research areas, environmental sciences & ecology also reveals influence to conclude diverse technology and studies methods for solving environment issues and point out new circular view. Operations research and management science is one of main research areas in circular economy, which not only aims to maximize the profit, but consider policy and environment impact to improve the resource planning and decision making models recently.
Some of regions focus on the issues in engineering and material science, and some pursue the balance development in technical engineering, industrial management, and policy. In particular, the scholars in Europe tend to find out the solution from circular economy on the basis of environmental and society demand.
Although dominant industrial power may provide scholars with richer research materials and resources the expansion of circular economy research still depends on methods and insights which actually improve regional resource efficiency. As the concept in Europe integrating both science and social science knowledge to frame circular ability and business model, the development also brings implications for policy makers to learn for future.

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