With the rapid development of the urbanization, the continuously increase of the urban population, and the housing supply shortage, the prices of urban housing rise rapidly. The housing problems of low-income families are prominent, under the impact of high prices. Facing the common problems, both China and South Korea have established a housing security system to solve the housing difficulties of low-income family in the city. This paper analyzes the main content of the housing security system in China and South Korea separately, and prompt the problems in the implementation process of China's current housing security system. At the same time drawing successful experience from South Korea housing security system, the paper put forward effective measures for the construction of housing security system of China.