Provided is a housing rental loan system and device using a blockchain. This system is a system that provides loans for housing rental funds, and when housing rental loans are executed, blocks are created based on the loan processing information, the blocks are added to the blockchain, and the blockchains are shared with each other. A plurality of first blockchain nodes, and a second blockchain that receives and stores blockchains shared by the first blockchain node, and generates loan processing result inquiry information based on the blockchain and provides it through an online interface Node.
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