The invention provides a lock management system and a lock management method, and relates to the technical field of smart locks. A user can establish a corresponding account through an account subsystem, and can grant the unlocking authority of a smart lock to other authorized parties through an authorization subsystem, in an authorization process, the digital signature of an authorization party needs to be used, and the digital signature of the authorization party has a unique corresponding relationship with the authorization party, so that the authorization information cannot be counterfeited. Meanwhile, only the authorized party obtaining authorization information can decrypt the ciphertext of the smart lock, so that the unauthorized personnel cannot unlock the smart lock. The authorized party can unlock the smart lock only through an electronic device without carrying a physical key, therefore the authorization process is simpler. At the same time, public and private key pairs corresponding to the authorization party are respectively stored in the lock management system and a personal terminal, and authorization and unlocking cannot be achieved through the public key or the private key alone, so that the unlocking process is more secure.