因為行動商務的發展成熟，人們的行動裝置不只是用來記事、聽歌，也可以用來看電子書。用戶從數位書城購買電子書之後，常常會需要使用特定的電子書閱讀軟體才可閱讀，對使用者來說，消費者如果在多家數位書城進行挑選或是比價，然後購買電子書，必須搭配各家書店提供的電子書閱讀軟體閱讀。因此，可以將雲端運算的特性，運用在電子書環境裡，整合來自不同數位書城的電子書，並且支持各類型電子書格式，從不同書城所購買的電子書都可以儲存在同一個地方，只要用行動書櫃的雲端閱讀器就可以閱讀電子書，達到整合電子書功能。行動書櫃同時也提供分享以及離線閱讀機制，同時行動書櫃也可以擔任交易認證單位，保護用戶消費資訊的安全。

Since the full development of mobile commerce, the mobile devices not only used as take notes and listen to music, also read e-books. In general, consumers have to use specific device to read e-books after buying from online bookstores. For users, if they comparing the price, choosing and buying books from online book stores, they have to read e-books with the reading software which bookstore provided. Therefore, the characteristic of cloud computing can be used in the environment of e-books to integrate e-books from different online bookstores and support various types format of e-books, so that the e-books from different bookstores can be stored in same place. As long as consumers use the cloud reader of Mobile-Bookcase to read may achieve the integration of e-books. The Mobile-Bookcase also provide the sharing and offline reading mechanisms, also serve as the role of trading certification to protect the security of consumers' information.