Purpose: Under a wide range of urban regeneration projects, efforts are undergoing to transform abandoned or empty plots, and lots in low use into small green areas, such as linear green space, public gardens, pocket parks, and ally gardens. Green areas within the cities are indeed known to bring positive effects, such as mitigating urban heat island effects through the development of fresh wind, decreasing air pollution, including fine dust, and the revitalization of communities. However, the quantitative analysis of positive effects of vegetation and the range of the impacts is not enough, whose verification is the aim of this study. Method: This study performed CFD (Computational Fluid Dynamics) simulation and the actual measurements of weather to examine the effects of green areas in Indongchon, one of the regeneration and revitalization areas in Daegu Metropolitan City, and surrounding areas on the nearby environment. The results were used to estimate the influence of previously created green space and analyze that of planned green areas. Result: It compared the examination results of the weather data and CFD simulation results and verified the feasibility of the model. The simulation model was utilized to inspect the impacts of previously formed green areas on the nearby environment and confirm that each type of green space has a different effect.