Microorganisms have played an important role in the chain of energy and chemical conversion on the planet and increase the awareness of the public in the age of the global environment of the planet. Classification and identification of microorganisms have been our basic intellectual activities and increase the necessity in the age of biodiversity. Therefore we developed an information-base which supports them. Yeasts were chosen as a model microorgnism in the development. The information-base is an interactive system in which users are able to infer a taxonomic structure of yeasts and assignment of newly found strain to a taxonomic group.