Abstract：Information services have become a strategic keystone of geological work in various countries in the 21st century. The geological information services based Internet and information technology can provide timely, effective, integrated and authoritative geoscience information and have been included in the strategic plan of national geological survey agencies of various countries. A consummate information service hierarchy is the prerequisite for the successful development of information services. Based on clarifying the related conceptions and definitions about geological information services, the authors analyze the features of modern information services, propose a relatively complete system framework of geological information services and elucidate the main content and relationships of various components in the system framework.