As a coping strategy for the population aging in Korea, it is necessary to build the comprehensive care system which can cover medical and/or health care as well as welfare at the same time. To build the system should be based on the systematic organization of integration frameworks (e.g., horizontal and vertical integration, linkage and coordination, and full integration) and on the region’s own distinct characteristics. Linkage and integration, common perceiving and sharing the integration itself and its objective should be required at the initial stage of building the system. After reviewing the principal characteristics of the system for the main advanced countries, the targets, types, and levels of integration for the system were examined and several directions of developing the system were suggested in this article. Some major instances of the directions would be to revise both National Health Insurance and Senior Long-Term Care Insurance Acts, to integrate training or educational program for personnels working at the medical, health, or welfare profession as well as to improve their expertise, to encourage the community dwellers’ participation and/or inclusion in the integration process, and so on.