PROBLEM TO BE SOLVED : To produce a social welfare economic environment which is satisfied.SOLUTION : A government linkage social welfare primary balance linkage surplus balance is calculated in arithmetic calculation, for supplying sufficient money to all social welfare organizations for expanding a real estate finance whole transmission linkage social welfare property, then, a transaction amount between companies required for the calculated surplus balance and social welfare, then, the social welfare income is gradually expanded.SELECTED DRAWING : Figure 1COPYRIGHT : (C)2017, JPO&INPIT