In these days, the public library role for the lifelong education is getting enlarger. Thus the study suggested the ground of argument for the necessity that the public library should be in charge of the lifelong education through the relationship between the public library and the lifelong education. Based on this argument, the tendency or trend of the lifelong education, which has been performed overseas and domestically, was researched in the aspects of content, object, connection, basic facility and etc. As the result, the basic data needed to establish the lifelong education system in the library was suggested.