For example, there were the exchanges of information to determine whether objects such as the welfare service or reduction of taxes of social premium between administration or local public entities of country until now. However, we spent time and labor on personal identification in full name, Address because we managed personal information with each number including resident certificate cord, the basic pension number, medical insurance person insured number in each engine with it was the exchanges of information that stepped over engine. About social security, tax, three fields of anti-disaster measures, it becomes possible by to introduce the field crossing-like common number, perform personal identification surely and quickly. In this way, we introduce system to realize administrative efficiency, improvement of people in convenience, fairer fair tax, social security system.