A self-service terminal is an unattended intelligent device designed based on human-computer interaction technology. By integrating hardware modules and customized software systems, it allows users to independently complete a series of operations such as information inquiry, business processing, and transaction settlement without manual assistance. Widely used in retail, finance, medical care, transportation and other scenarios (such as self-checkout machines, ATMs, scenic spot ticket machines), its core value is to break the constraints of time and manpower, realizing 24/7 automated service delivery.