The phenomenon of an unstoppable force of urbanization decreases the quantities of natural vegetation, replacing them with concrete buildings and low albedo surfaces. The innovative design of building envelopes has been considered one of the leading solutions for decreasing environmental load, especially in design and construction as a passive design strategy. On the other hand, the use of vegetation on the vertical surface of buildings is rising. Through this study, a numerical analysis using Computational Fluid Dynamic (CFD) model of vertical greening system as a natural shading device was conducted. Several scenarios were conducted with distance as the principal parameter. The aim was to prove the contribution of green technology to improve the cooling performance of the building.