The Chinese coastal regions are the high risk areas of natural disasters for their lowland and weak and sensitive eco-evironment. The relative sea-level rising (RSLR), resulting from the piling of global sea-level rising and regional land subsidence, is to speed up in the 21st century. Certainly the RSLR will exacerbate the land submerging, the disaster from storm-tide and flood-waterlogging and the water shortage, and then affect urban withstanding function, construction safety and eco-resources. According to sustainable development theory, the sustainable utilization of resources and environment and sustainable development of economy and society can both be effectively achieved in coastal regions of China in the 21st century only by the implementation of controlling discharge of greenhouse gas, optimal exploitation of and artificial recharge of ground-water, systematic control of land subsidence, higher design standards for tide and flood controlengineering, improving urban anti-disaster ability, a study on strategy and policy for RSLR and establishment of forecast and pre-warning institution. The Chinese coastal regions are the high risk areas of natural disasters for their lowland and weak and sensitive eco-evironment. The relative sea-level rising (RSLR), resulting from the piling of global sea-level rising and regional land subsidence, is Certainly the RSLR will exacerbate the land submerging, the disaster from storm-tide and flood-waterlogging and the water shortage, and then affect urban withstanding function, construction safety and eco-resources. According to sustainable development theory , the sustainable utilization of resources and environment and sustainable development of economy and society can both be made achieved in coastal regions of China in the 21st century only by the implementation of controlling discharge of greenhouse gas, optimal exploitation of and artificial recharge of ground-water , systematic control of land subsidence, higher design standards for tide and flood controlengineering, improving urban anti-disa ster ability, a study on strategy and policy for RSLR and establishment of forecast and pre-warning institution.