The integrated development of library and metaverse requires library to promote"virtual and real integration"services under the action logic of people-orientation,service-body and technology-use.Therefore,the library should not only establish practical dimensions including the integration of ethical norms,the mutual construction of virtual and real time and space,the switching of individual identities,the interpenetration of social relationships,and the interconnection of production and life in both virtual and real scenarios,so as to determine the orientation of"virtual and real integration"services,and analyze and judge comprehensively the potential ethical risks from the perspectives on the relationship between human and technology,users,library and librarian,so as to explore ways to avoid and control risks.