Abstract: According to the three-dimensional space of natural, economy and society, the sustainable development evaluation model based on the space vector method evaluates the degree and quality of sustainable development through the degrees of development, coordination and sustainability. According to this model, the shortage of the low-carbon and ecological development evaluation model of the urban based on space vector method is analyzed. Then the improved evaluation model is proposed. In this improved model, the degrees of the coordination and sustainability of the low-carbon and ecological development of the urban are redefined. According to this improved model, a comparative study is conducted byusing the index system and data put forward by our team. In order to promote the sustainable low-carbon and ecological development of the urban, this improved model emphasizes the coordinated development of nature, economy and society.

Key words: the improvement of the space vector method, the low-carbon and ecological development of the urban, the comprehensive evaluation