Blockchain constructs a kind of decentralized，distributed，and whole network maintained database system，guaranteeing the general ledger tamperability，safety and stability by digital encryption technique and some consensus mechanism. Someone called Satoshi Nakamoto integrated great ideas in cryptography，mathematics and computer science to create Bitcoin as a first digital asset in the world by means of Blockchain technology. Though in the primary stage，Blockchain driven by algorithm and technology changes traditional centralized society management mechanism，demonstrating extraordinary economic and sociological significance. It will lead the revolution of value internet，make the intelligent contract feasible and help mankind striding into the intelligent society if well combined with Internet of thing and artificial intelligence. Blockchain can optimize the internal business procedure management，solve numbers of certificates management problem，and it has irreplaceable value in the emerging business of digital trust，intelligent trust and family trust.