The rapid economic growth, urbanization, and industrialization have led to a scarcity of land resources in coastal areas, exacerbating the conflict between humans and the environment. In order to promote economic development, attention has turned to the sea, and various coastal engineering projects have been undertaken, sparking a wave of land reclamation. However, while these efforts bring economic and social benefits, they also have implications for ecological relationships. To respond to and plan for changes in the coastline and land cover in a timely manner, this paper proposes and constructs a GIS system that integrates remote sensing image recognition models. The system combines geographic information system development technology with image recognition technology, streamlining the processing and identification of image data. This approach is particularly advantageous for marine management departments in their long-term monitoring and dynamic management of coastal lines, ensuring a more effective and efficient response.