A digital asset transaction method is implemented using a connected device connectable to the Internet and a closed device not connectable to the Internet and includes the following steps: the connected device displays a first check message according to a transaction data input thereto by a user; the connected device transmits the transaction data to the closed device after the user confirms the first check message matches the transaction data; the closed device displays a second check message according to the transaction data transmitted thereto by the connected device; the closed device transmits an authentication data to the connected device after the user confirms the second check message matches the transaction data; and the connected device executes the digital asset transaction after receiving the authentication data from the closed device. With the above method, the user can verify transaction content on different devices and decide whether to execute the transaction.