Facing the problems of global climate change and the population， resources and environment，China must modify the existing urban development pattern and build the conserving resource and friendly environment city. Thereby， low carbon eco-agglomeration is the only way to achieve sustainable development for Chinese cities. The concept of the low-carbon was firstly introduced. Based on the definition and analysis of low carbon eco-agglomeration， it also states the relationship between the low carbon eco-agglomeration and the livability， and proposes “the four Layers-one Core” hierarchy of human settlements of low carbon eco-agglomeration. Then， its characteristics and tentatively constructs evaluation index system for the livability of low carbon eco-agglomeration are analyzed in order to provide a reference and guidance to upgrade the livability， a theoretical support to improve and optimize for the human settlements even successfully guides the urban group towards the low-carbon and ecology.