The sustainable planning of city has favored the implementation and conservation of greenery in the urban context. Urban green space and the related greenery coverage of the urban environment have been associated with urban recreation and the ecological quality of towns. Therefore, this research is mainly to assess and issue covering the intensity green of the area of Taipei, which takes green areas of each person and NDVI value (normalized difference vegetation index) methods by RS and GIS software. Utilize data and chart to explain and cover the change of the green area, and how to increase its green area part effectively, could improve the green environment of city. The result of study reveals the green land rate of Taipei is about 3.3m^2/person at present, and the green covering still be part of the situation that average NDVI is 0.305 in the whole city, but in the city center, its NDVI value all presents negative value, this needs to be improved, could get rid of the environment of the jungle of cement as soon as possible so. And we can improve the green purpose in the city, develop urban agriculture of city, increase green covering rate, this can reach the goal developed continuously forever.