Abstract: Coastline ecosystems are the key ecological security barriers for coastal cities. How to scientifically and efficiently reveal the changing patterns of the carrying capacity of a regional coastline ecosystem is a key scientific problem for the current research. With the northwest Mediterranean coastline as the research object, the 60-year land use data set is established with the theoretical support of landscape ecology landscape patterns (patches, corridors and substrates), and the land use evolution pattern of the Northwest Mediterranean coastline ecosystem at multidimensional time and geographical scales is accurately and efficiently revealed by remote sensing technology. At the same time, the theory of landscape ecology is applied to explore a new theoretical system of shoreline ecosystem monitoring. By assessing the ecological security of forest carbon stocks in the global coastline at a large scale, the significance of the reduction of infrastructure construction in coastal cities for the restoration of the coastline ecosystem is revealed; by extrapolating the spatial and temporal evolution models of the global coastline, the northwestern Mediterranean coastline and the representative cities of Figueras and Valencia in this corridor at a small and medium scale, to conclude that there exists the natural strong positive correlation between resilience and the surrounding environment. This suggests that the necessity of strengthening the monitoring of the connectivity of the coastline ecosystem, to provide scientific, accurate, and efficient theoretical and technical support for the optimization of land control and construction along the Chinese coastline, the natural recovery of the coastal urban ecosystem, and the improvement of disaster resilience in the future, driven by the inevitable tourism.