Abstract: A blockchain-based personal information management apparatus and method. The blockchain-based personal information management method includes recording, by a first server device, an encrypted value of personal information of a user and a hash value of the personal information in a blockchain, generating, by the first server device, a proof key to be used to generate a personal information proof of the personal information and a verification key to be used to verify the personal information proof based on the personal information, generating, by a blockchain-based personal information management apparatus, the personal information proof from values recorded in the blockchain using the proof key and a prestored prove function related to a zero-knowledge proof, and verifying, by a second server device, the personal information proof from the values recorded in the blockchain using the verification key and a prestored verify function related to the zero-knowledge proof.