Blockchain-based inquiry and quotation transaction method and system

The invention discloses a blockchain-based inquiry and quotation transaction method and system. The method can reduce the transaction credit risk, improve the automation level of supervision and reduce the systematic financial risk of enquiry and quotation transaction. The method comprises the following steps: building an industry alliance chain of a transaction business district, a registration institution, a clearing and settlement structure, a supervision institution and a judicial institution, recognizing the identity of a transaction opponent by means of an alliance identity authentication system, evaluating historical transaction evaluation, and reducing the transaction credit risk; separating the business operation and the management operation, reducing the morality and compliance risks in the business operation, and ensuring the authenticity and effectiveness of the transaction intention of an inquiry party and a quotation party; and linking an inquiry and quotation process, transaction elements and a