The invention provides a de-centralization consensus method based on proof of time. The method comprises the following steps that within the time 0-t1, a plurality of users sign time certification data containing a current timestamp by utilizing private keys, and peer nodes where the users belong receive signatures; within the time t1-t2, each peer node selects the best signature in the signaturesreceived by the peer node, packages the signature into a signature data block and carries out broadcasting, after the peer node receives the broadcasted signature, the received signature is comparedwith the best known signature of the peer node, if the received signature is better, the best known signature is replaced and broadcasted, and lastly, all peer nodes select the unique best signature of the whole network; and within the time t2-T, the peer node where the best signature belongs packages a to-be-recorded block and carries out broadcasting, and other nodes pass the verification and accept the to-be-recorded block. According to the de-centralization consensus method and system based on the proof of time and the block chain system, the defects of Byzantium fault tolerance, proof ofwork, proof of stake, proof of delegation stake and other existing consensus methods and the block chains thereof are solved, and the effects of fairness, high efficiency, energy conservation and usability are achieved.