The concept of Bitcoin was first proposed by Satoshi Nakamoto on November 1, 2008, and was officially born on January 3, 2009. The open-source software designed and released according to Satoshi Nakamoto's ideas and the P2P network built on it is a digital encrypted currency for peer-to-peer (P2P) transmission, with a total of 21 million pieces. Bitcoin is generated through a large number of calculations based on a specific algorithm. It does not rely on specific currency institutions to issue. It uses a distributed database composed of many nodes in the entire P2P network to confirm and record all transaction behaviors and uses cryptographic design to ensure currency circulation. The security of the link can ensure that the value of the currency cannot be manipulated artificially through the mass production of Bitcoin. The design based on cryptography allows Bitcoin to be transferred, paid, and cashed only by the real owner, and also ensures the anonymity of currency ownership and circulation transactions.