文章针对2004-2019年间公共图书馆的财政经费投入和公共图书馆服务绩效之间的关系进行了实证分析。研究发现，财政经费投入之于公共图书馆的影响具有如下三个特征：“先强后弱”的阶段性、对于规模因子影响的显著性和对密度因子影响的局部不显著性。通过将研究结果与社会认识层次论的理论构想加以契合分析后发现，公共图书馆的绩效观正在经历深刻转型，走向参考咨询和分级信息服务已成为公共图书馆公益性信息服务的基本趋向。

Present study conducted an empirical study on the relationship of public financial fund investment and performance of the public library information service. The findings of this research include that： 1) there is a strong effect of public financial fund invested on public libraries and the performance of these libraries at the initial stage but turn to weak gradually. 2) the public finance fund invested in public libraries affected the scale factor significantly but non-significant on the density factor partially. Based on a joint analysis procedure on the empirical findings of this research and the Hierarchical Social Cognition Theory, this study also discussed the in-depth transformation of the understanding on public libraries’ performance assessment and the reference service and hierarchical information service became the basic tendency of the public information service performed by public libraries.