The invention discloses a method based on internet for protecting memory devcie, the protected object is memory device, includes that proceeding read-write protection of data security to the protected object, encrypting the data, proceeding identify certified to users with legal identity, and refuse illegal users, which is characterized in that, internet is applied to proceed global online identification. Password protection is used to identify legal users identity in data of device program control area of the protected object, counting, real-time displaying and monitoring all the illegal users through a server management platform of manufacturer. The invention protects all data of storage device, and protects rights and interests of users with legal identity, and provides identity registration information management service to users with legal identity for life. The invention provides protection to users data security and to operative mode of the protected object.When the protected object is lost or used by users with illegal identity, the invention can provide related information of recourse or rights protection to users with legal identity.