In recent years, with the development of socio-economic and the improvement of people's living standards.There is a sharp increase of urban residential demand, and then the rapid growth of residential price. The rising housing prices are bound to affect the vital interests of ordinary people. Research on housing prices has been the focus of community concern about the issue, and also a controversial issue of research area, but the study did not have related to the different types of residential housing prices. Therefore, from a comparative perspective, the study of determining reasonable prices for different types of housing will contribute to use the invisible leverage of price scientificly to regulating the housing market, then protecting the city housing market develop harmoniously.This paper analyed the general commercial residential and high-end commercial residential's supply and demand from the two aspects of the status quo of the existing housing supply system in Xi'an of the affordable housing, and evaluated purchasing power of the different income groups of Xi'an; Have studyed these three types of residential constitutions of prices from the perspective of a comparative and make a foundation to determine a reasonable price for theses residentials; Have maked the cost-plus pricing method based on interval number and comparable examples of pricing method based on unascertained number, and determined the cost factors and market factors' weight based on the three-point estimate method, and then make the housing reasonable prices; Have identified different types of housing prices through examples and evaluate the rationality of these prices;On the basis of the above, make the harmonious development of the housing market in Xi'an of policy recommendations.This article study let the mathematical theory of the Interval number and the Unascertained number into the making of different types of housing price, which put forward a new perspective to the study of housing prices, the analysis of the examplesshow that this method has good interoperability and rationality, which provides a reference for the government's macroeconomic regulation, developers formulate prices,and the consumers evaluat the reasonableness of the price ,and has a certain degree of practical significance. |