[Problem] To provide a digital currency exchange system in which it is advantageous for a delivery company paid by a digital currency to hold the digital currency. [Solution] A digital currency exchange system 1, which exchanges a digital currency, issues a digital currency for payment from a shipper to a delivery company, transfers the issued digital currency to an account owned by the delivery company, and if a digital currency exchange instruction is received before a certain period elapses, the digital currency exchange system 1 exchanges the digital currency by applying a certain discount rate to a predetermined exchange rate, whereas after the certain period elapses, the digital currency exchange system 1 exchanges the digital currency on the basis of the predetermined exchange rate.
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