Rapid aging society has extended the span of aged life of the elderly people in fast speed and the importance of holistic health including the elderly people’s physical, psychological and social health has been emphasized in these years.But considerations for their social health have not been made sufficiently so far.Accordingly, environments need to be made to satisfy the behavioral requirement of the elderly physically, psychologically, socially, and economically.At the point of the time when the demand for quality of housing increases, a variety of approached should be considered to develop an appropriate environment prepared for social relations after retirement. Therefore, the purpose of this study was to identify changes in the residential preference of the baby boomers, the core group of the future elderly population. The study used the pre-post experimental research design. This design is to compare the changes in the preference responses to the residential type for the elderly before and after new information on possible social relationship change. The target of investigation was the baby boomer working in the public realm job. This study was conducted from 28th September to October 2013. The survey questionnaire was distributed and collected through personal visits. A total of 120 were used the data was analyzed by using SPSS 18.0. The survey tools asked the general and residential characteristics to the targets and investigated residential location, type, size, ownership type, residence-selection factors. As results,in case of couple living together, those surveyed were rarely interested in the residential type taken into consideration for the elderly, hoping to continue to reside in the existing house. But many changed the previous preference being influenced by the given information. In case of living alone in health, the elderly had the tendency in favor of the residential environment to get along with a lot of people, although having a high demand for a private space. The preference patterns were diversely dispersed compared with those in case of couple living together in health. In case of couple living together in poor health, the preference ratio of independent elderly apartment with care service became very high and the ratio of other preference patters was very low. In case of living alone in poor health, it showed the change apparently preference patterns. When the preference changed before and after providing information, the case of living along in poor health showed a greatest impact on the change in the preference showing the tendency to move to the independent elderly apartment with care service. Whether care service exists of was formed the most important factor depending on health status.