The invention relates to the technical field of a self-service fee-paying system, and a self-service fee-paying terminal pay-in prompting system for power supply and a using method. The self-service fee-paying terminal pay-in prompting system for power supply is characterized by including a request transmission module, a feedback result parse module, a determination module, a prompting module, a preposition module, and a business query interface module, the output end of the request transmission module is connected with the preposition module, the preposition module is connected with the business query interface module, the feedback signal output end of the preposition module is connected with the feedback result parse module, the output end of the feedback result parse module is connected with the determination module, and the output end of the determination module is connected with the prompting module. Compared with the prior art, the self-service fee-paying terminal pay-in prompting system can realize the connection of a counter processing terminal and a fee-paying business system, can automatically and timely pop up a pay-in prompt, and can effectively prevent the problem of low work efficiency caused by personnel mistake and omission. The self-service fee-paying terminal pay-in prompting system has the advantages of reasonable structure and reliable work.