基於XBRL格式在企業報告資訊上的優勢，全球各重要經濟體近年來陸續應用XBRL技術進行財報格式的轉換與標準化，而在推動XBRL實務發展的過程中，XBRL分類標準的建置為核心關鍵因素。各國於制訂分類標準基於成本效益考量，分類標準內容通常僅涵蓋企業報告之通用元素，企業若僅按分類標準編製報告，可能導致有用訊息之喪失。以XBRL格式作為申報工具時，企業若基於自願性揭露及報告之完整性，則必須對分類標準自行進行延伸。本研究藉由美國分類標準延伸情況作為借鏡，探討台灣未來開放分類標準延伸時，如何進行分類標準之延伸及其規則和方法。 / Considering the advantages of XBRL-formatted information in business reports, many major global economic leagues have adopted XBRL technology in financial reports’ transformation or standardization. XBRL Taxonomy development is the core factor in promoting XBRL into practice. Taking cost-benefit analysis into account, competent authorities usually design their taxonomy with only basic elements used in business reports. If enterprises prepare their reports just based on the taxonomy, they may lose some useful information. Therefore, they must extend taxonomy to make a voluntary disclosure when enterprises file their reports in XBRL-formatted. This research explores the rules and methods of taxonomy extensions for TIFRS Taxonomy by referring to how companies in the U.S. make taxonomy extensions.