作为美国最大的公共图书馆联邦资金来源，美国博物馆与图书馆服务协会（IMLS）拥有授予财政援助、收集数据、建立战略伙伴关系以及就博物馆、图书馆和信息服务向决策者和其他联邦机构提供建议的法定权力。IMLS发布的《2021财年财务报告》结合IMLS拨付资金在各州图书馆的使用情况，呈现了美国公共图书馆联邦经费保障机制的特点。我国在完善公共图书馆经费保障机制方面需要量化和完善相关法律法规、细化图书馆经费的使用范围、加强图书馆经费管理和监督，在保基本的前提下强化专项经费和激励性经费的投入。

As the most important federal sources of fund for American public libraries, the IMLS has the legal right to grant financial aids, collect data, construct strategy relationship and provide suggestions to the decision makers and other federal agencies about museums, libraries and data services. The Report shows the federal financial guarantee features of American public library. In our country, more laws and regulations should be made to grant fund to public libraries, including the quantity, the scope of use of funds, supervision rules, and under the premise of basic funds, strengthening special funding and incentive funding.