To evaluate the effect of urban planning on urban thermal climate quantitatively,an urban region thermal climate prediction model based on the calculation of heat transfer,heat storage and evaporation rate from various kinds of underlying surfaces is presented and a new evaluating index named as urban district local temperature rising is introduced.Taking a certain eco-city planning project in Beijing as a case study,its temperature variation between pre-and post-urban planning is studied by the model and index.By comparing with normal urban planning,the results show that under the conditions of high temperature and huge solar radiation in midsummer,effective urban planning strategies(such as the increase of lawn and tree ratio,reduction of building energy consumption and building heat release,and so on) can alleviate the negative effect of urbanization on thermal climate.