The resident population in Beijing shows a trend of bi-directional flow，with some people immigrating and others emigrating. Among the immigrating residents living in Beijing within 20 years，the ones who have the thought of removing from Beijing approximately constitute 80% of the whole respondents. Whereas，among which who are sure of emigration merely account for 28%. Overall，the fact that the rate of emigration is not high，while the potential intention of emigration is extremely high. The main factors affecting residents to emigrate are related to the balance of their job and income，the housing problems and the supports of their parents.