Knowledge Management is one of the important subjects that is widely used in different fields of knowledge. The current paper includes the topics related to knowledge management in the field of Mahdiism studies. The system of Mahdiism topics, Mahdiism resources and libraries, Mahdiism studies researchers and scholars, the centers and research centers that conduct research and cultural activities in the field of Mahdiism, the produced software focusing on Mahdiism are all examples of Islamic knowledge management in the field of Mahdiism studies. This study has dealt with the system of mahdiism topics and their role in Islamic knowledge management. Therefore, the main question of the study is that: How are the Mahdiism topics categorized and what role do they play in Islamic knowledge management? It is clear that through strategic categorization, the new concepts and terms in the field of Mahdiism can be discovered and the richness of the Mahdiism knowledge thesaurus can be increased. Such approach can be an innovation in Mahdiism studies.