Purpose/Significance To clarify the research priorties, application areas and interrelationships of medical related informatics subdisciplines, and to provide references for talent cultivation planning and policy formulation. Method/Process Bibliometrics is utilized to explore the research priorties of the subdisciplines, Ochiai coefficients at the level of subject headings and at the level of literatures are respectively used to reveal the structure of the subdisciplines of medical related informatics.Result/Conclusion Each subdiscipline utilizes information technology to enhance the efficiency of research, education, or service in medicine or related fields, but each has its own priorties. Most subdisciplines focus on the storage, retrieval, analysis and effective use of information. In the disciplinary framework, medical informatics, as the core, is more closely related to digital health, nursing informatics, public health informatics, and user health, informatics; while cheminformatics, computational biology, and dental informatics have relatively weaker ties to other subdisciplines.