Sea level rise has become a global issue in the face of intensifying extreme events. How can people living in deltas combine the existing local systems, resources and technologies to cope with the problems caused by sea level rise? Most cities in deltas around the world are currently the economic and political centers of the countries in which they are located and are home to large populations. At the same time, due to the fertile land, the deltas have been reclaimed to provide the agricultural base for the countries in which they are located. For example, the Mekong Delta in Vietnam and the Rhine-Meuse Delta in the west of the Netherlands, the Netherlands has achieved the second largest agricultural country in the world through smart agriculture and technological innovation, but also faces the risk of seawater intrusion in the coastal area; because of the poor economic base of the Vietnamese people, most of the local people depend on mangroves, so it has caused disruption and damage to the mangrove ecosystem.