Due to the strong water stress caused by water shortage, there are multiple vulnerabilities in the ecosystem, social system and economic system in dryland. Carrying out territorial ecological restoration in dryland is a key approach to adapt to the dual pressures of climate change and human activities, as well as to enhance the ecosystem resilience. In response to the strategic demand for building a green and intelligent digital ecological civilization, it is urgently necessary to develop a simulator for territorial ecological restoration that integrates ecological risk assessment, cost-benefit accounting, and spatial planning and location selection technologies from the perspective of coupling ecohydrological and socioeconomic processes. The overall goals of this project are enhancing the digital and intelligent level of on territorial planning and providing scientific supports on the decision-making of territorial ecological restoration in dryland. This project takes the dryland in northern China as the main study area, focusing on two key scientific issues: the formation mechanism of ecosystem resilience under the influence of ecohydrological processes in dryland, and the spatial interaction path of social-economic-ecological processes in dryland. Three key technologies have been developed, including the ecological risk assessment technology for dryland based on ecosystem resilience, the cost-benefit accounting technology for ecological restoration that integrates the social, economic and ecological processes in dryland, and the planning and decision-making model for territorial ecological restoration of dryland. The outcome will provide scientific and technological supports for breaking through the technical bottleneck of quantitative simulation of territorial ecological restoration.