區塊鏈技術藉著比特幣而發揚光大，經過將近十年的考驗，區塊鏈被視為足 以改變全球經濟模式的火紅科技，各種應用的想法如雨後春筍般出現，本文趁勢 提出台灣股票結算交割的區塊鏈應用。本文從最原始的區塊鏈系統——比特幣介 紹起，深入討論區塊鏈運作的機制，包括共識的形成與交易的驗證方式。比特幣 的區塊鏈系統中的某些設定對於股票結算交割來說是缺陷，本文提出改良的方式， 包括許可制的區塊鏈、引入特殊功能節點及採用實名制等，試圖讓區塊鏈技術能 夠完美的應用於結算交割系統。最後分析應用區塊鏈之後所能夠達到的經濟與社 會效益。 / After nearly ten-year challenge, blockchain was known because of Bitcoin, and regarded as the most famous technology that could change the way how the whole world works. Lots of application ideas appear at this moment, this paper tries to follow the trend and discuss about the Taiwan stock clearing and settlement system. Begin with the original blockchain system, Bitcoin, reveal how actually blockchain works including the formation of consensus and the way of transactions verification. There are some defects when implementing the application by using Bitcoin system directly. This thesis proposes the way to improve the blockchain system which includes permission blockchain system, special functional nodes and implementation of real name blockchain system, and try to make modified blockchian system applicable to clearing and settlement system. Last but not least, this thesis analyzes the benefit of economy and society when the application is employed.