Abstarct: The growing trend of urbanization and the need to provide suitable land for housing, increasing factories and industrial settlements, reducing the green space in cities, etc. are among the factors that in modern cities are the excessive consumption of energy resources and the Consequently, they have caused many environmental problems such as air pollution, creation of heat islands, increased greenhouse gases and so on. In recent decades, increasing awareness of environmental issues has led to the application of sustainability criteria in the design of urban and building systems. Among these, attention to plants and increasing green space are among the most important proposed solutions for realizing green architecture and reducing environmental problems. Due to the high volume of construction in the cities, today the facades of buildings have the greatest potential for planting plants and creating vertical green systems. Vertical green systems, as an efficient tool, have improved urban spaces socially and environmentally and have also reduced energy consumption by improving the thermal performance of buildings. In the present study, first, using library studies, we have presented some introduction to the types of green systems and their efficiency and implementation considerations. In order to investigate the impact of these systems on the thermal performance of buildings, a green wall prototype has been created and installed on the south and west walls of a residential building in Shahroud. A comparative comparison with a wall without vegetation revealed that vertical green systems had a significant effect on lowering the outer surface temperature of the wall as well as reducing the wall temperature fluctuations. The green wall tested in this study reduced the average maximum external surface temperature by 13 degrees in the south and about 19 degrees in the west.