Developing of real estate industry is one of the important ways to optimize Chongqing's industry structure and develop Chongqing's economy based on the relative theory. This paper brings forward an aggregate demand forecasting model on the residence of Chongqing main city zone according as data of the level of residence and relative factors in a certain period of Chongqing main city zone,by the way of gradually regressing and compounding forecasting. The model indicates that, according with the characteristic of residence,the aggregate demand of the residence is positive correlation to the polulation of Chongqing main city zone.