The invention discloses a front-end device capable of simultaneously supporting electronic legal currency and
digital currency circulation. The front-end device comprises a card body, a financial chiparranged on the card body, a display screen, a private key
certificate module, a communication module, an input module and a battery for supplying power, wherein the display screen, the private key
certificate module, the communication module, the input module and the battery are arranged on the card body; the financial
chip is used for realizing transaction of the electronic legal currency, andthe transaction mode of the electronic legal currency comprises access,
payment, account transfer and / or remittance; the private key
certificate module is used for acquiring a private key and a certificate required for realizing
digital currency transaction signature; the communication module is used for data communication between the front-end device and other front-end devices and / or an intelligent terminal; the display screen is used for displaying transaction information of the
digital currency; and the input module is used for inputting
authorization information for confirming digital currency transaction. The front-end device is compatible with all existing circulation environments such as electronic legal currency storing and taking,
payment and account transferring, meanwhile, thecirculation requirement of digital currency can be met, and the electronic legal currency and the digital currency can be used in an integrated mode.