Based on the theory of ecosystem health, ten representative indicators are selected from three subsystems of resources, environment, landscape ecology, and human activities according to vitality, organizational power, and resilience, to construct an ecosystem health evaluation index system of coastal zones using remote sensing technology. Here, we introduce a coupling model of TOPSIS and VOR ecosystem health metrics to assess the ecological health from Xin Yang Port to Chuan Dong Port along the central coast of Jiangsu Province. The results showed that regions with good health accounted for 27.62% of the area, and the moderate health status accounted for 60.94%, and 11.44% were poor; hence the overall ecological health status was moderately favorable. From the perspective of the type and spatial distribution of land cover, DouLong Port to Si Maoyou River is dominated by beach vegetation, farmland, and coastal aquaculture areas. Vegetation and water have a stabilizing effect on climate regulation and the overall ecological health is good. Due to the construction of DaFeng Port, the vegetation coverage in this area is low and the heat island effect is strong. The buildings disrupt the originally connected natural landscape, resulting in the increase of the number of patches and the reduction of the patch area, which aggravates the landscape fragmentation and damage to the ecological system of the original coastal zone, and ecological health is relatively poor. Conversely, the area from Xin Yang port to DuLong Port and ChuanDong Port is dominated by natural reserves with high vegetation coverage, little human interference, and good ecological health. As the coupling model assessment method is based on remote sensing data and does not need to be weighted, the results are more objective and better reflect the actual health status of the coastal ecosystems.