Real estate is an important sector of the national economy,which is directly related to the rise and fall of the national economy.Recently,China's real estate has witnessed series of contradictions and problems:Firstly,the price and vacant housing increase at an alarming rate;Secondly,the government's every round of the regulation and control policy in a short time only curb property prices,accompanied by different degrees of price rise.Therefore,this paper,based on the grey correlation model,is to analyze the impact degree of Beijing's real estate demand factors.In addition,this paper also enumerates the importance of factors,ranging from the most to the least important in its order,namely the total amount of residents,the average living area per capita,completed area of affordable housing,consumer price index,disposable income per capita,market price of housings,the gross domestic production,which in order to provide suggestions for promoting healthy development in real estate market.