In a method of providing cryptocurrency cashback using blockchain technology, in which when cryptocurrency is transferred from the payer's electronic wallet to the affiliated store's electronic wallet according to payment via cryptocurrency using blockchain technology, the payment server 200 provides cryptocurrency cashback, an embodiment of the disclosure provides credits proportional to the amount of payment, as cashback, to the payer's credit electronic wallet, and the affiliated store receiving the amount of payment deducts points proportional to received points from the received points and stores in the affiliated store's credit electronic wallet.