近年來，全球各國相繼致力從事相關數位圖書館與數位館藏計畫，俾能建置全球性數位館藏，在網際網路上提供一全球性的數位圖書館服務。基本上，數位圖書館原動力來自數位化資料。目前，將現有館藏或出版品數位化處理，為圖書館建置數位館藏之重要途徑。本文旨在介紹國內外一些重要數位圖書館與數位館藏計畫現況，主要包括美國、中華民國、日本、德國、與加拿大，並進而探討全球數位館藏之發展趨勢。這些計畫涵蓋數位化範圍相當廣，包括珍藏文獻、檔案、圖書、期刊雜誌、地園、視聽聽資料等。各項計畫已完成之數位資料量，視所採用之數位化技術'如影像掃描、光學字元辨識、鍵檔，其成果計量單位不一。有關各計畫之緣起、內容或範圍、計畫成果與目標等，文內皆加以分別敘述。此外，從這些寶貴的計畫實驗經驗與成果，可進一步瞭解到全球數位館藏之發展方向。

　　In recent years, more and more digital library and digital collection projects are in progress around the world with the goal of developing the global digital col1ection accessible via Internet. Basically, the major impetus of digital library comes from digital collection. At present, digitization is one of the important methods of building digital collection. This article will focus on twelve significant projects initiated in different countries, including the United States, Republic of China, Japan, Germany as well as Canada. In these projects a wide range of materials have been digitized, such as rare documents, whole books, periodical articles, sound recordings, maps, etc. Digitize in this paper refers to conversion to digital format through imaging, OCR, re-keying, or audio/video data capture. What described for each project covers project initiation, participating institutions, scope of project, digitized output, as well as project goal. Moreover, the future development of global digital collection is also addressed, based on the invaluable experience involved in these ongoing projects, including the innumerable experiments of digitization activities.