The invention relates to a protection method of a memory device based on a
mobile communication network. The protection method takes the memory device as a protected object, implements global online
authentication by a network, carries out the
data security read /
write protection to the protected object, encrypts the data and authenticating the identity of a legal identity characteristic holder, and refuses an illegal user from using, wherein the network is a
mobile communication network; and the global online locking is also carried out by adopting the
mobile communication network. In the protection method, the
password protection is used for the identity
authentication of a legal user in the data of an equipment procedure control region of the protected object, and all illegal user groups are taken statistics, displayed at the real time and supervised on a
server management platform of a manufacturer. The protection method protects all data of the memory device as well as rights and interests of the legal identity characteristic holder, provides the lifelong identity registration
information management service for the legal identity characteristic holder, and also protects the user
data security and the working status of the protected object. The invention also can provide recourse and rights activist information for the legal identity characteristic holder when the protected object is lost or illegally used.