This study is to identify quantitatively the function of carbon dioxide emissions reduction due to temperature and energy reduction according to direct carbon dioxide storage, shade provision, and evaportanspiration of urban park. According to the result of study, landscape tree indicated high carbon dioxide storage effect compare to bush, in which broadleaf tree indicated higher storage function than coniferous tree. It is believed to be the storage of carbon dioxide can be increased by increasing the composition rate of forest plants in the urban park. According to the direct estimation result of carbon dioxide storage in terms of example area, storage of carbon dioxide is estimated to be "seoul a zone" $476,818.8kg{cdot}CO_2/m^2yr$, "anyang b zone" $186,435.7{cdot}CO_2/m^2yr$, "daejeon c zone" $262,826{cdot}CO_2/m^2yr$, "kwangju d zone" $231,657.8{cdot}CO_2/m^2yr$. The carbon dioxide storage per unit area estimated to be "seoul a zone" $3.4{cdot}CO_2/m^2yr$, "anyang b zone" $5.0{cdot}CO_2/m^2yr$, "daejeon c zone" $2.6{cdot}CO_2/m^2yr$, "kwangju d zone" $5.6{cdot}CO_2/m^2yr$. The result of indirect carbon dioxide reduction effect estimated to be "seoul a zone" $291,603.4{cdot}CO_2/m^2yr$, "anyang b zone" $165,462.4{cdot}CO_2/m^2yr$, "daejeon c zone" $141,719.2{cdot}CO_2/m^2yr$, "kwangju d zone" $154,803.4{cdot}CO_2/m^2yr$. Carbon dioxide reduction potential amount through the urban park was increased to 1.6 times to 1.8 times when calculated to the indirect effect.