For monitoring agricultural drought, there have quantities of indexes and standards, in this thesis, I try to certify the NDVI value also can apply for monitoring and classifying agricultural drought, except the conventional drought standards. In the interest of proving NDVI values are available, I select two regions in Hungary, Szolnok-Túr Plane-Túr Plane, and Nyírség to be the sample areas which have different environmental conditions.And to approach the certification of NDVI value, I choose two regular standards use for agricultural drought, SPI-3 and SMI.