Digital currency is an electromagnetic recording data with property value attribute.The characteristics of digital currency in its dependent block-chain system, such as the payment consideration between the unspecified person, the exchangeability with the legal currency, and the online transfer using the electronic information processing system, make it possible to discuss digital currency on its private law nature as a kind of data property right in the current legal framework from the data theory.In view of the fact that data has been included in the scope of protection objects in the General Principles of Civil Law in China, digital currency, as a kind of data, should become a new type of legal object and be protected on the basis of legal theoretical support.