Soil is the largest pool of organic carbon in terrestrial system and plays a key role in carbon cycle. Urban parks and gardens make valuable ecosystem and service to citizens and they have long been for their recreational service. But we never take attention to soil condition for the long time. Soil forming process is not similar with natural soil in urban, it needed more attention. Urban park soil is key factor for city’s biomes. In this study focusing Soil organic carbon pools of Park and Roadside gardening soils in Ulaanbaatar city. Overall mean SOC concentration Ulaanbaatar city soils were between 0.35±3.24% and median values of 0.79%, respectively. Ulaanbaatar City Park and gardening soil represent 584 hectare land in Ulaanbaatar and it area keeps 23604.7 t/he soil organic carbon, City governor and environment departments should focus on soil organic carbon improvement, such as irrigation technique, green manure and organic composts.
