To provide a technique capable of ensuring traceability of renewable energy power.SOLUTION: A power transaction history generation system notifies a transaction history generation terminal of a supply amount to be transmitted to a predetermined power network among generated power; the transaction history generation terminal issues a transaction currency corresponding to the notified supply amount and transmits it to a supplier wallet of a supplier; a consumer terminal notifies the transaction history generation terminal of a demand amount received from the supplier via the predetermined power network; the transaction history generation terminal generates a transaction in the transaction currency corresponding to the demand amount and notifies a supplier terminal of it; and the supplier terminal transmits, based on the transaction, a predetermined amount of transaction currency from the supplier wallet to a consumer wallet of a consumer.SELECTED DRAWING: Figure 1
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