The goal of a university library website is to meet its users' information needs. Although librarians endeavor to construct the websites, the users' satisfaction is still oftentimes low. Therefore, identifying problems of university library websites and evaluating the users' identification with the usability of library websites are important factors to improve the performance of university library websites. This study used the Chinese version of National Taiwan University Library website to conduct usability tests. The results showed that the website often used library terminology to have prevented users from easy access. In addition, the color contrast of the navigation bar was not clear enough, with excessive distracting contents to deter navigation. The results were analyzed to help improve the Chinese version of the interface design of National Taiwan University Library website.