A digital artwork display device, comprising a registration unit, a transaction unit, and a file decryption unit, wherein the registration unit is configured to apply for a device identifier and a device public-private key pair, and the device public-private key pair comprises a device public key and a device private key that is corresponding to the device public key; the transaction unit is configured to acquire a use license, and the use license comprises the device identifier and a content key ciphertext obtained by encrypting a content key by using the device public key; and the file decryption unit is configured to decrypt the content key ciphertext in the use license by using the device private key so as to obtain the content key, and decrypt an encrypted file that is obtained by using the content key so as to obtain an original file; the device identifier is obtained by performing a hash operation with an international mobile equipment identity, a product serial number, or a media access control address, of the digital artwork display device; wherein the transaction unit comprises a transaction credential acquisition unit and a license acquisition unit; the transaction credential acquisition unit is configured to request and acquire a transaction credential, and the transaction credential comprises the device identifier; and the license acquisition unit is configured to request and acquire the use license by using the transaction credential; the transaction credential acquisition unit is further configured to perform a payment operation; the transaction credential further comprises a content identifier of the encrypted file and a transaction credential digital signature; the use license further comprises a content identifier of the encrypted file and a license digital signature; the license digital signature is generated by using a license private key; the license acquisition unit is further configured to verify the license digital signature by using a license public key corresponding to the license private key; and the transaction credential is a token and generated by using a token mechanism. wherein the registration unit is configured to apply for a device identifier and a device public-private key pair, and the device public-private key pair comprises a device public key and a device private key that is corresponding to the device public key; the transaction unit is configured to acquire a use license, and the use license comprises the device identifier and a content key ciphertext obtained by encrypting a content key by using the device public key; and the file decryption unit is configured to decrypt the content key ciphertext in the use license by using the device private key so as to obtain the content key, and decrypt an encrypted file that is obtained by using the content key so as to obtain an original file; the device identifier is obtained by performing a hash operation with an international mobile equipment identity, a product serial number, or a media access control address, of the digital artwork display device; wherein the transaction unit comprises a transaction credential acquisition unit and a license acquisition unit; the transaction credential acquisition unit is configured to request and acquire a transaction credential, and the transaction credential comprises the device identifier; and the license acquisition unit is configured to request and acquire the use license by using the transaction credential; the transaction credential acquisition unit is further configured to perform a payment operation; the transaction credential further comprises a content identifier of the encrypted file and a transaction credential digital signature; the use license further comprises a content identifier of the encrypted file and a license digital signature; the license digital signature is generated by using a license private key; the license acquisition unit is further configured to verify the license digital signature by using a license public key corresponding to the license private key; and the transaction credential is a token and generated by using a token mechanism.