本文探討在人口變遷及全球化的環境下，公共圖書館如何發展館藏。除介紹澳洲利物浦市立圖書館、新南威爾斯州公共圖書館、加拿大公共圖書館發展多元文化館藏的經驗，並介紹波士頓公共圖書館、溫哥華公共圖書館、紐約皇后郡公共圖書館的館藏發展政策有關多語言或多元文化館藏發展之相關條文。另外，本文針對臺北市的人口結構、臺北市立圖書館的外文館藏的數量、流通量，加以分析，並檢視該館策略計畫及館藏發展政策內容對人口變遷及全球化的相關條文。

The changing face of the Taiwan population is reflected in the changing library and information needs of public library patrons. Diverse communities need different types of materials than what has traditionally been available. A key issue in serving the multicultural community is the need to adopt a revised vision of collection development. This article describes the experiences of Australian, Canadian and American public libraries in developing multilingual collection and introduces the methods used in Taipei Public Library to develop collection under the circumstance of globalization and demographic changing.