This application "Service Bell" provides merchants with digital management of physical seats and customization of service requests. The specific process is to formulate the number of tables, table numbers and various service options in advance. Click on the table number option to print out the belt. The QRCode receipt is given to the customer. The customer can scan the barcode to enter the webpage and select the service options prepared by the merchant in advance. Once the customer sends a service request, the application will receive a notification and display it on the screen.