Abstract: Korea's aging population began in 2000, with the development of society, the population growth began to slow down, the number of old citizens growing and they living longer, the pension pressure began to increase. After many years of exploration, Korea has established a series of elderly security system. With the popularization of the social pension system, population ageing promoted the welfare of senior citizens, including income security, medical security, housing security spare-time life security have significant development. Korea’s social pension security system has been gradually finalized and formed its own unique feature in coverage, service contents and facilities, financing and payment. Korea’s social pension security system is proved to be representative in Asia, and its successful practice has become center of attention.