In this study, the cost of City Park for low carbon dioxide emissions was investigated by LCC analysis. Selecting 7 kinds of alternatives for reducing carbon dioxide, costs were calculated for each alternatives. Calculated on the basis of the cost of LCC were analyzed. In addition, LCCO2 was calculated on the basis of the quantity of carbon dioxide emissions in the operation period. The result of analysis, economic feasibility of renewable energy facilities was poor because of high initial cost and maintenance cost. However, the cost of facilities could be decreased by development and standardization. And it is necessary environmental approach rather than economics. In case of LCCO2, the reduction of carbon dioxide may realize by replacing existing energy system to renewable energy.