Abstract: An E-wallet service system based on an idle screen application comprising: a push system receiving a first payment request message including seller information, customer identification information, payment object information, and payment amount information from a payment request system of a seller and pushing the first payment request message to a customer terminal corresponding to the customer identification information of the first payment request message; and a customer terminal having an idle screen application which includes an e-wallet module and a payment processing module, and requesting a payment approval to a payment system via a payment approval system by performing the e-wallet module and the payment processing module.