以4个全文外文期刊数据库Elsevier、Springer、EBSCOhost和JohnWiley为例，运用丰富度指数（S）、Shannon多样性指数（H）和Pielou均匀度指数（J）等评估和比较几个数据库的信息量。分析表明，EBSCOhost中ASP的刊种丰富度（S）和主题丰富度（S₁）在几个数据库中最高，而H和J值最低；在信息指数与用户使用率之间的关系中，分析表明Elsevier数据库的H和J值最高，其用户访问量和全文下载量最多，性价比最高。研究结果可为图书馆了解数据库提供新视角。

With four periodicals full-text database Elsevier, Springer, EBSCOhost and JohnWiley, for example, using the richness index (S), Shannon diversity index (H) and the Pielou evenness index (J) to evaluate and compare the information amount of several databases. Data analysis showed that the S and S₁ of ASP publication of EBSCOhost are the highest in several databases and H and J is the lowest. Analysis the relationship between information index and the user usage, and Analysis shows that the Elsevier database H and J from the highest value, the user visits and full-text downloads is the highest, and most highest performance-to-price ratio. The research results can provide perspective for library knowledge database.