Standards for library and information science schools are formal, published criteria-qualitative and quantitative-prepared and approved by one or more library and information science associations, for the evaluation of library and information science educational programs. This paper discusses the four standards for library and information science schools respectively approved by the American Library Association, Library Association (UK), Institute of Information Scientists and International Federation of Library Associations and Institutions, and describes these standards including their titles, scopes, history, content and implementation. After comparing the four standards, the paper makes some conclusions and proposals.