The invention discloses a big data management system and method applying a block chain technology, and relates to the technical field of blockchain. The big data management system comprises a databaselayer, a block chain layer, a data sharing layer and a data application layer. The big data management system realizes big data management by adopting a blockchain technology, constructs an architecture system comprising a database layer, a block chain layer, a data sharing layer and a data application layer, and realizes data interaction by fully utilizing the characteristics of decentralization, tamper resistance, distributed common accounting, asymmetric encryption, data security storage and the like of the block chain technology. By adopting an encryption function and a decryption function, the big data management system realizes encryption and decryption of big data, and improves the data security performance. In addition, the big data management system adopts a sharing algorithm, realizes data sharing in the blockchain, fully utilizes a sharing mechanism, has the advantages of decentralization, detrust, data encryption and the like, and can well solve the data management problemexisting in big data application.