The welfare enhancement of discharged prisoners should be an important part in social welfare, criminal policy and correction services because it has great benefits for both discharged prisoners themselves and society. Even with these advantages, it has been relatively neglected in society and academic circles. This is caused by focusing on the programs, policies and systems related to criminals in prison. Also it is difficult to intervene their privacy because they already had their obligations for crime. Though every step of procedures for criminals as crime→ investigation→ justice→ correction→ after care for discharged prisoners has its own importance, the failure of the last stage to prevent discharged prisoners from committing crime again means that they can be fallen into vicious cycle and efforts so far have gone in vain. If the rehabilitation stage is executed scientifically and professionally, the effectiveness to prevent them from committing second offense could be high even though the prior steps were performed poorly. This study starts with the assumption that a health society can be established by helping discharged prisoners not to commit crimes again through systematic and scientific social support. So, especially it focuses on the roles of rehabilitation services and social network that help them overcome the obstacles surrounding them. Values and philosophy that should be planted in our society to promote discharged prisoners' social welfare. In addition, readjusting them to social life that can lead to enhance welfare and promise the public safety is examined based on interrelationship between prevention of second offence and rehabilitation services. Because rehabilitation agency for discharged prisoners rely on the justice department's policy, there are sufficient needs to examine and analyze the direction for rehabilitation services of government.