Small and medium-sized power users are potential demand response resources with small single load capacity but large amount and strong power flexibility. A demand response system solution based on blockchain technology is designed, innovating the operation mode of demand response aggregator, and providing a feasible path for small and medium-sized users to participatein demand response events, so as to promote the development of demand response enterprise in the future. The scheme uses the block-chain technology to realize the depository and settlement services of demand response transaction data, to ensure that the demand response transaction data between aggregators and users cannot be tampered with, and the transaction process can be tracked, so as to improve the efficiency and credibility of evaluation and settlement.