：文章对美国城市公共图书馆协会143家不同规模的美国城市图书馆的移动服务情况进行了网站访查、内容分析和馆员调查。调查发现：移动服务在美国城市图书馆已经普及，97%的图书馆至少有一个移动网站或APP；响应式Web设计移动网站成为图书馆当前最主流的移动服务平台；各类社交媒体在图书馆中被广泛使用，提升了用户的黏性；这些图书馆积极开拓新的移动服务功能，如APP下载链接、移动参考咨询、条形码扫描、位置导航、移动打印等。分析认为：美国城市图书馆正全力以赴打造新技术支持下的移动服务以满足当地社区民众对文献知识与信息的需求；与美国城市图书馆提供的移动服务相比，我国公共图书馆还需要在移动服务普及程度、移动网站和APP建设、社交媒体应用、移动服务功能拓展等方面进行加强。

Through a combination of mobile website visits, content analysis and librarian interviews, the authors surveyed 143 U.S. libraries. The results show that over 97% of the libraries have at least one mobile website or APP, and the RWD mobile website device has become the most mainstream mobile service platform. Diverse social media sectors are widely adopted in the libraries to promote the services to mobile users. Libraries are actively developing new service features for remote access, such as APP download links, mobile reference services, QR/bar code scanning, location navigation, mobile printing and so on. The U.S. libraries are terribly striving to meet each local community's remote access needs via new technologies. Compared with the mobile services provided by urban libraries in the U.S., the public libraries in China need to strengthen the popularization of mobile services, the construction of mobile websites and APP, the application of social media, and the expansion of mobile service functions.