Micropayment is one of electronic payment systems and applied to the occasions of small value but frequent transactions, such as Internet-based service and commercial activities of digital contents.

• 小额付费是电子付费系统中一个独立的研究方向，适用于必须有效率地处理持续且单次额度相当小的交易场合，通常应用在以网际网路为基础的服务或是数位内容的消费行为。