In 1898, Howard put forward "garden city" as an introspection of the expense human paid for cities' vigorous development. One hundred years later, with the acceleration of urbanization China came the same problem. Nowadays, under the background of the new urbanization, livability as an important direction in the research of urban geography has become the hot topics in the study of urban development at present. Hence, many scholars focus on the study of urban residential suitability. This paper base on the data of numerous filed survey questionnaires on the six indexes such as facilities perfection, travel convenience, residential security, environmental health, landscape beauty and the sense of belonging of the local residents, questionnaires are designed to investigate the residents who had stable life in Lanzhou for more than a year. Then using the method of questionnaire, ArcGIS space analysis method and cluster analysis, and establish urban habitability comprehensive evaluation indexes and model. Choosing 48 streets and a high and technology development zone of major regions of Lanzhou as the research object. This paper evaluates the livability and analyses the spatial characteristics of Lanzhou city, from the perspective of the three spatial levels on city, district and area as basic unit. Study on the spatial structure of urban livability restrict factors has great theoretical and practical significance to urban development programming, and it can provide reference for the urban construction of Lanzhou. The following conclusions are drawn: Lanzhou city lives with a general level of overall livability. For instance, Chengguan which is located in the center of city is the most livable district and Qilihe is the worst. That is to say, the livability is obviously restricted by rivers and mountains spatially and expressed zonally along valleys. The livability of Lanzhou city turns out to be a "multi-center" pattern and present huge differences between east and west. Generally speaking, the score descents of the city level and district level gradually from city center to suburbs in spatial pattern and divergences of indexes are also lager. It accords with the result of evaluation on area level.