The report has assessed 10 factors originating from climate change (Climate Change), directly affecting 12 distinct marine ecosystems in Vietnam. In order to decrease influence, the influencing factors include: increase in water temperature, storms and waves, sea level rise, turbidity, acidification of seawater, local freshening, salinization, erosion, interference marine circulation disturbances, and sedimentation. According to the decreasing degree of impact, the Ecosystems are classified into 4 groups: The group is very strongly affected, including 1 Ecosystem which is the coastal lagoon; the Strongly affected group includes 6 Ecosystems, including seagrass beds, coral reefs, sandy beaches, tidal flats, estuaries, and mangroves; The group with moderate impact includes 3 Ecosystems including saltwater lakes, permanent wetlands, and upwelling waters; The weakly affected group includes 2 Ecosystems: seabed and intertidal reefs. Ecosystems are distributed over 6 marine ecological regions, classified into 3 groups according to the degree of influence of Climate Change: High-impact areas include the Gulf of Tonkin (Northern and North Central Coast) and the East Sea. Male; The group of moderately affected regions, including the Central Central Coast, South Central Coast, and Southwest Seas; The group of low-impact areas includes the waters of the Hoang Sa and Truong Sa archipelagoes. The article proposes a list of specific ecosystems in each sea area that need to be prioritized for Climate Change response.