The National Library in Slovenia was fully authorized to develop on the national level the library network made up of all types of libraries. To fulfill the tasks, a special advisory center/service was founded to perform advising and developing tasks, as well as supervisory tasks. In the last decade, a significant change of its role has come about. The Advisory center actively participates in transforming public libraries into modern information centers on the one hand and into specialized centers for different target groups (juveniles, unemployed, retired person, etc.) on the other hand. (Author/MES)