The herbarium of the Altai Botanical Garden is the most important tool for studying the species diversity of vascular plants of the Republic of Kazakhstan, which is a basic component of botanical science. The value of any herbarium fund was determined by Carl Linnaeus: "Herbarium praestat omni icone, necessarium omni botanico" ("herbarium has superiority over any image and is necessary for every botanist"). [recovered version] The herbarium of the Altai Botanical Garden began to form in 1936, almost simultaneously from the day of its foundation, and at the present stage is of scientific, educational and historical value. The herbarium fund has an international index – ABG. At the present stage, it consists of more than 30,000 herbarium specimens, which include systematic and geographical collections formed according to the Engler system. At the end of the 20th century - the beginning of the 21st century, a considerable number of works based on materials stored in ABG were published, as well as candidate's and doctoral dissertations were completed. The herbarium collection is unique not only in the richness of the collected samples, but also in the history of collections dated 1937– 1941. More than one generation of scientists from the botanical garden took part in the formation of the herbarium, but the greatest contribution to the replenishment of the herbarium fund was made by the famous researcher of the flora of the Kazakh Altai Yu.A. Kotukhov. The ABG herbarium most fully presents the species he collected from the families Poaceae Barnhart, Asteraceae Bercht. J.Presl, Apiaceae Lindl., Fabaceae Lindl.. The typical samples, which served to describe new taxa for science and flora of Kazakhstan, are especially valuable. Currently, the herbarium fund is being systematized again, updated and replenished with new samples representing the unique factual material of the natural flora of the East Kazakhstan region. The creation of the ABG Digital Herbarium opens access to the information stored in our Herbarium to a wide range of interested parties, in addition, it has become possible to join the Global Biodiversity Information System GBIF.org and the opening of our data to the world community, which will allow specialists from other countries to use this data in global international projects.