Taxonomy is an important input to the documentation of plant genetic resources collections. It is the basis for various genebank management activities such as the identification, search of the accessions and structuring of the collection. For identification purposes, taxonomic inputs such as genus, species, and intraspecific name (including authorities) are generally included in the documentation systems of genebanks (M.van Veller et al., 2008).  The quantity of data associated with taxonomic information is vast and in recent years, to enhance the efficiency of data handling, computer database technology is increasingly being used to organize these data. Data sources for species – related information are usually organized in the form of species checklists for various purposes or databases with the scientific name as primary entry point. For the conservation of PGR correctly determined species are an indispensable prerequisite and key to relevant information from other sources. As Thormann et al. (1999) point out, “using the correct taxonomic name is essential to obtain appropriate information on a species”. There are a number of Internet sources with species-related information. The “Species 2000” checklist of “all known species of plants”, the Mansfeld’s World Database of Agricultural and Horticultural Crops, and Kew Bibliographic Databases (KBD) covering cultivated plant species worldwide. Other sources for cultivated plants information are the taxonomic database of the USDA Genetic Resources Information Network (GRIN), GBIF (Global Biodiversity Information Facility). Such sources need to be used to verify the correct scientific name, synonyms, vernacular names and species authors. For correctly documenting species, authors and taxonomic literature references, standards have been published for authors (Brummitt and Powell, 1992), journal abbreviations (Lawrence et al., 1968; Bridson and Smith, 1991) and books (Stafley and Cowan).  In order to effectively use the information on the germplasm collections at the national level, ReGen – that represents the information system on plant genetic resources in the Republic of Moldova was established. For elaboration of ReGen system was used programming language Visual Fox Pro 9.0. The system was set up for operation system Microsoft Windows 2000 and XP. ReGen is a relational information system. Databases consist of many tables connected by special fields.   In ReGen system, the taxonomic data is the first level at which users can input, search the information on accessions, and it determines the protocols used in the management of collections.   ReGen is an easily accessible database with reliable information on species names and their hierarchical classification. The database is reviewed periodically to ensure high quality with valid classifications, revisions, and additions of newly described species. The ReGen includes documented taxonomic information of plant genetic resources at the national level. For each scientific name, this database includes the authority, taxonomic rank, associated synonyms and vernacular names where available.   The information stored in database is structured by the botanical description such as family, genus and species.  In first of all, is input the family, after that genus, and finally the species. If it is necessary, the photo of current species can/not be displayed.  For such a large collection taxonomy is essential for identification and documentation the wide range of diversity in the assortment. Taxonomy of cultivated plants is an important tool to describe the variability of plant genetic resources.