With the population's aging, nursing for the disabled old is more and more concerned.The problems are how to get funds for the nursing service, build professional nursing organization and provide professional services.China has a big aged population, we should not only depend on the governmental social nursing benefits, but also build perfect commercial nursing insurance system.This paper is to analyze the demand and supply of the elderly's long term care service and elaborate the way and the necessity of developing commercial long term care insurance in Beijing.