PROBLEM TO BE SOLVED : To support smooth relocation by preliminarily preventing the occurrence of rent delinquency while securing a chance of the acquisition of an expected customer.SOLUTION : A relocation support device 20 is configured to output the property information of sales real estate property matching a family structure to each tenant given the most significant rent payment capability rank in response to a relocation support request from a rental guarantee business support device 10, and to, when the rent rank of rental real estate property during occupancy is equivalent to a rank which is higher than the rent payment capability rank, output the property information of the rental real estate property whose rent rank is equivalent to a rank which is lower than the rent payment capability rank to each tenant given the rent payment capability rank other than the most significant rent payment capability rank, and to calculate and output the estimation sum of relocation costs to move destination property in response to a relocation cost estimation request from a person in charge.COPYRIGHT : (C)2013, JPO&INPIT