The housing industry, as a new economy growth point and hot point of consumption in our national economy, has huge potentials for its development. Because of the underdevelopment of the commodity housing market in our country, there are some unhealthy tendencies, such as low level of development, poor quality of housing, waste of resources, large deviation between housing function and its price, and so on. So there is urgent need to take measures for avoiding these unhealthy phenomena. It is one of the strongest measures to evaluate the economy of the commodity housing. In this paper the meaning, principle and method of the evaluation on economy of the commodity housing were discussed. It will play a positive role to promote spreading this work.