| This paper wills analysis the situation of reform base on severer city's reform, such as Jiaxing, Yiwu, Haining and so on, and summarize the experience of house-site reform in Zhejiang province. Then use the PCA (principal component analysis) to study the factors which influence the desire of rural residence replaces cities' and towns' housing for peasant. After PCA, we will take Yaozhuang town as example to build an IAAH (indoor air assessment model by the analytical hierarchy process) to analysis the effect of the reform. Through sorting and hierarchical single consistency test and computing combination weight vectors and consistency test obtain all indexes of weights and study the problems which we should pay more attention.Through on zhejiang house-site replacement general condition summary and case analysis, some conclusions are obtained as follows:First, there are there types for this reform basically:"The model of two separations and two replacement","three concentrations and three replacements"and"three replacements model". Second, there are several characteristics for reform in Zhejiang province: Strengthening the government leading role is the premise of ensuring the reform smoothly; make balance benefit between several groups being one of the most important work and belonging with the market mechanism; Implement operation of enterprise, unified planning and management; Third, the farmer for better housing intention is more and more intense, for new residential environment, the peasant have less sedulous demands nearby in the old house, the peasants' ShouTu ideas gradually desalt, the dependence of land is weaker and weaker Fourth, According to the principal components load, ten factors can be conclude into five categories, namely social security factors, employment factor, family economic factors, householder age factor, rural housing factors. use these 5 kinds of factors that replaces ten factors on house-site replacement mode analysis, can make the problem is simplified greatly. Fifth, The study shows house-site replacement reform is a relationship to urbanization construction and rural development system engineering. In addition, such as transportation, non-agricultural income, medical security relations between farmers'interests have achieved certain result. |