Malei has been engaged in teaching and research in the field of information organization and retrieval, published dozens of academic papers and participated in one monograph. Participated in a provincial-level project (project leader) and undertook the research work of a school-level project as the leader. Courses such as library English, western language cataloging, book classification, information retrieval language, information organization, information description technology and method, information organization and retrieval, multimedia technology and application are offered for undergraduates.