Bitcoin is the earliest virtual currency. Point-to-point transmission represents a decentralized payment system. It issues currency by relying on some specific algorithms without a trusted third-party. It also bases on the mechanism of Proof of Work (POW) to achieve the decentralized and fair destinations. Bitcoin is based on the technology of blockchain, thus it can achieve the characteristic of no tampering. Using the Hashcash algorithm, it is difficult to break the Bitcoin system. The characteristics of blockchain include decentralized, data synchronization, openness, anonymity, and security. This paper tries to introduce Bitcoin and blockchain. Besides, we will share the experience of constructing the Bitcoin blockchain environment.