The present invention relates to a system for managing electronic documents based on blockchain technology, and more specifically, in a system for verifying and destroying document data, a main blockchain composed of a plurality of main nodes, a plurality of sub It is composed of a node, and includes a sub-blockchain for storing document data, an electronic document issuing server for generating an electronic document, and a viewing terminal for viewing the generated electronic document, wherein the main blockchain includes the electronic document When an electronic document is generated by the issuing server, a main block including a transaction related to the generated electronic document is generated by a predetermined main node among the plurality of main nodes, and the generated electronic document is transmitted to the sub-blockchain, The sub-blockchain relates to an electronic document management system, characterized in that storing the transmitted electronic document.
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