Piecoin is a digital currency based on the Raspberry Pi 4 as the hardware carrier, using the self-developed Timer algorithm and the Linux mining system, and the miners are evenly distributed according to the computing power they contribute. In terms of application, miners can mortgage their own mining pools, lock warehouses to pay dividends, and connect with third-party physical shopping malls and recharge systems to expand project consensus and achieve the purpose of increasing currency prices. The Paibi mining machine has the advantages of small size, quietness, and low power consumption. It is the preferred mining machine for home mining. At the same time, the later project party can recycle the mining machine to maximize the profit of the mining machine.