Abstract: To address the challenges of information asymmetry and data coordination imbalance among multiple stakeholders in carbon emission monitoring,this study constructs a carbon emission monitoring system integrating "blockchain-MRV mechanism" following the logic of "problem→theory→method" based on Hall's Three-Dimensional Structure theory.By integrating inter-subject collaborative game and rights and responsibilities definition within the logic dimension,the full cycle of monitoring-reporting-verification within the time dimension,and technological integration within the knowledge dimension,a "One-Chain,Three-Dimension,Multi-Stakeholder" system architecture is proposed.The research values lies in,first,the organic introduction of Hall's Three-Dimensional Theory into the MRV mechanism,thereby expanding the theoretical reliability and implementation sustainability of carbon emission monitoring; second,the use of smart contract technology to realize automated data tracking,encrypted evidence storage,and real-time verification,which can significantly improve the efficiency of MRV processes (such as compressing the verification cycle to the minute level) and data credibility (with a tampering rate approaching zero),as well as the high security of carbon emission data (IPFS distributed storage and asymmetric encryption),strong consistency (authoritative factor library locking),and multi-stakeholder coordination (permission interlocking mechanism) of carbon emission data.The constructed carbon emission monitoring system can effectively bridge the dimensional fragmentation of traditional MRV mechanisms,thus achieving deep integration of technology,processes,and subjects,and enhances the "double coordination" between multi-dimensional data and multiple stakeholders.