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With the proposal and promotion of the "double carbon" goal, the green certificate quota system and the carbon emission trading system have attracted wide attention. However, China has not yet formed a mature and effective green certificate market and carbon emission market, and the current system has not performed well in encouraging the consumption of renewable energy and promoting the emission reduction effect. In order to improve the market activity, this paper proposes a product mutual recognition system of green certificate and CCER. Meanwhile, based on blockchain technology, the joint market business process of green certificate and carbon emission right is designed, and the consensus mechanism of blockchain is utilized and improved. On the basis of ensuring the security and privacy of the trading data of green certificate and carbon emission market, By encouraging market trading to incentivize renewable energy generation and limit the carbon emissions of conventional fossil fuel units, we will facilitate the energy transition and advance the "two-carbon" goal.