Abstract: Evaluation and comparison of the eco environmental quality of Hainan Island was carried out with the aid of remote sensing and GIS and in line with the principle of landscape ecology. The results show that the eco environmental quality is declining gradually from the center of the island outwards, with its rainforests diminishing in area and shrinking inwards, and that human disturbance goes deep into the rainforest ecosystem. Nevertheless, desertification and land degradation develops adversely in the island.