Adopting a one terminal multi application model, covering various different scenarios such as supermarket checkout, ordering and pick-up, cafeteria stalls, and welcome reporting. The supermarket scene greatly improves the collection efficiency of the receiving bank system; In the scenario of ordering and picking up meals, make reservations through online apps, scan QR codes/swipe cards offline to receive meals, facilitating nutritional analysis and food traceability; In the scene of welcoming new arrivals, an external ID card reader is used to compare ID card photos with college entrance examination photos through facial recognition function, and the three certificates are compared to prevent impersonation.