The project on research and demonstration of pivotal technology on desertified land control in Beijing-Tianjing-Hebei Sandstorm Source Zone aims at national important demand on key science and technology such as desertified land control in north sandy region, ecological restoration and conservation in typical fragile environmental region. Based on the long-term ecological observation and demonstration combined with controlled experiment and data of multiple remote sensing, the mechanism about formation of desertified land and ecological restoration will be ascertained, and the science and technology system of desertified land control coupled with deserticulture is established. The decision support system, which is constructed by integrating achievements from observation, controlled experiment, demonstration etc., it will provide technology support for environment control project, ecological security of Beijing-Tianjing-Hebei Sandstorm Source Zone, and meeting ecological requirement in Beijing Olympic Winter Games in 2022.