[1] The union's objectives are to promote the study of microbiological sciences internationally: initiate, facilitate and coordinate research and other scientific activities which involve international cooperation; ensure the discussion and dissemination of the results of international conferences, symposia and meetings and assist in the publication of their reports; represent microbiological sciences in ISC and maintain contact with other international organizations.

IUMS activities include the classification and nomenclature of bacteria, fungi and viruses, food microbiology, medical microbiology and diagnostics, culture collections, education, and biological standardization.

The president-elect of IUMS is Professor Eliora Ron of Tel Aviv University.[when?]

Each division is responsible for the organization of their own International Congresses.

They work together toward the goal of furthering microbiology research and communication globally.