The year 2007 US-Korea FTA contracting may have removed a international border hurdle in terms of custom tax problem that may have been protected by each country. After that, there remains an infinite competition between the two countries for international trades especially for medical service. Private medical insurance can play an important role in suppressing oversea hospital use in top-level medical consumers and in introducing the high-level of domestic medical technology to low-income medical consumers. And thus, the private insurance system is expected to lead the patients of both extremes in terms of their salary income to domestic medical consumption. Private medical insurance system is also expected to help lessen medical expenses and lower the price of pre-existing medical technology. For activating normally the private medical insurance, one of practical methods is to ensure the neutralized and efficient network by the central role play of medical profession groups. Now is the high change that we can make a better medical welfare environment, if the advantage and the meaning of each insurance (including private insurance system) institution can be substantiated.