This study addressed actual profile of residential living in low income class, and identified public leased housing policies for low income class, their actual housing conditions and problems in aspect of housing maintenance, so that it could explore promising policy measures for upgrading quantity and quality of public leased housing, as well as efficient ways to maintain leased housing in the interest of reliable housing supply for low income class. As a result, this study came to the following conclusions: First, it is required to prepare housing supply and distribution plans by clearly setting up target groups that would move in public leased housing. Second, it is required in principle to build up public leased housing in vicinity of living blocks in order to get policy effects from public leased housing in favor of better living in low income class. Third, it is necessary that housing support system for low income class should be established in associations with housing expenses assistance or deposit-based lease assistance→public leased housing→private leased housing→private installment sale housing respectively in regard to filtering process of housing. For promising ways of improving current public leased housing maintenance system, this study suggested how to build up comprehensive maintenance system for tenants, how to facilitate tenants to join housing maintenance and how to prepare appropriate long-term maintenance plan on the basis of turning awareness about public leased housing maintenance to better directions.