The purpose of this study is to investigate the way of planning of community library which undertakes direct circulation service to community area. In the former paper (the tenth report), we presented the three models of catchment area of the town library divided into the small, middle and large scale according to the number of open stack books, and also the standard model of catchment area of the village library. We present the way of use of the models here based on our theory, as a case study to plan the library system actually to regional area.