The present invention relates to a system and a method for mediating a business real estate, wherein the system comprises : an offered house information collection unit for collecting information on a business real estate offered house provided from a plurality of lessors; an offered house information providing unit for extracting and providing customized offered house information matching customized information preset by a lessee among the collected business real estate offered house information; a mediation request receiving unit for receiving a real estate transaction brokerage request for at least one of the customized offered house information from the lessee; a contract making unit for providing a bank account number allocated to the offered house to the lessee, and making a real estate transaction contract by paying the transaction payment to the lessor when the transaction payment to the account number is completed from the lessee; and a consulting information providing unit for providing company moving consulting information including at least one among moving-in expenses, interior costs, and cleaning costs to the lessee.COPYRIGHT KIPO 2018