The present invention relates to a block chain-based real estate peer-to-peer (P2P) intermediating transaction system, which increases the reliability of an Internet real estate intermediation. According to the present invention, a safe transaction can be performed based on a block chain technique in which traders share and compare ledgers (information), and a user is not required to go through an intermediate step such as a broker or the like through a P2P transaction function.COPYRIGHT KIPO 2019