本文首先從系統智慧化兩個領域逐漸匯流的角度切入，探討子文件的智慧化程度實是影響智慧型檢索系統性能的重要因素；接著，從XML發展趨勢觀之，我們認為以XML為核心的技術已經逐漸扮演了提升文件智能的重要角色；再者，藉由一系列的實作，我們以XML為核心，建置了XML資料交換系統、XML新聞管理與出版系統、XML/CMARC編目系統和WAPOPAC行動公用目錄系統，分別驗證了XML在資料交換方面、在內文語意描述方面、在圖書館自動化的編目系統方面和行動資訊檢索方面，皆有著不可忽視的應用潛力。

　　　　　This study focuses on the integration of intelligent documents and intelligent systems. First, the paper defines the intelligent document as an electronic document that has extra self-description information, semantically. We believe that the intelligence of the document would be an important factor that impacts the performance of information retrieval systems. Next, by exploring the development of XML, we find that the XML-based technologies already became the principle of intelligent documents. Moreover, a series of system implementations have been done in this paper, they are a data exchange system, a news publication system, an XML-based CMARC cataloging system and a WAP-based OPAC system. These experiments demonstrate the application potentials of XML in many fields, such as electronic data exchange, electronic publication, library automation and mobile information service of library.