Due to climate change and human activities plant community transformation occurred in Central Mongolia, and however it is a long-term process, there are some changes in vegetation community properties. Our research aim was to detect vegetation community change under anthropogenic activities at monitoring sites situated in the mountain meadow steppe, steppe, and forest based on data collected during 2011-2015. Vegetation community as regard of important component of ecosystem can be main indicator to detect the land degradation. We determined changes in vegetation cover, species composition, ecological group, phytocenosis origin of plant species and species diversity as main indicator of land degradation. Our study in selected monitoring points indicated possibility of mountainmeadow steppe change into mountain steppe, birch forest into meadow steppe, Siberian pine forest into mountain steppe in Khugnu-Tarna National Park. We suggest that this is due to climate change and drought occurrence.