The one of the most epoch-making changes of 21 century society is aged of population. This country is as very speedy of an increasing rate of population as can’t inquire into the origin of it in the world. In 2010 the aging rate of Korea is over 11%. It is more immediate than others to prepare for aged society that have so many social and political problems. If I inquire into social welfare legislation for the elderly in Korea as fields of welfare as following. First, as social insurance law, National Pension Act, Long-term Care Insurance Act for the Aged, Employment Insurance Act, second as public assistance law, Basic Pension Act for Aged, National Basic Living Security Act. Medical Care Assistance Act, third as social welfare service law welfare law for Aged, including Welfare of the aged Act, Act on the Promotion and Guarantee of Access for the Disabled, the Aged, and Pregnant Women to Facilities and Information, Employment Promotion for the Aged Act, and as the acts about relating welfare system, Senior Product Industry Promotion Act, the Falling Birthrate and the Aging of Society Basic Act and so on. But social welfare law system for elderly of Korea is partially and separately because these are made up as taking measures suited to the occasions. These law system for elderly as being temporary means are criticised that this law system have not solved social needs of social welfare supply systemically and all aroundly. In this side, reform of welfare law system is main work to solve imminently in elderly society. After the law for the welfare of the aged is established in 1981, social welfare laws for the aged are in various sides, especially going into 2000 the legislation for the welfare of the aged of Korea is developed epochally because Korea entered aging society as UN population standard. At the present time there is nothing to speak of basic law about welfare for the aged. Welfare of the aged Act is just welfare service law for the aged focusing on facilities welfare and about care for the aged Long-term Care Insurance Act for the Aged plays an important part, and so it can not be called the basic law about welfare for the aged, Thus it is urgently to establish the basic law about welfare for the aged.