The real estate tax works as the most important part of the property taxes，which undertakes the tasks of improving the utilities of land，promoting the social income fairness and stabilizing the local governments’ financial revenue. The starting of levying real estate tax has the effects of standardizing the taxes and fees of real estate market，promoting the healthy development of it and prohibiting the speculation of it. This paper starts with the designing of real estate tax system，studying on the whole various factors which will affect the supply and demand of real estate and the price of it.