Disclosed is a method for dynamically repairing an application, which includes: a client receiving a pre-configured repaired program segment; the repaired program segment is stored; an address that stores the repaired program segment is recorded; the address of the repaired program segment is stored in an application APP, and when the APP is in operation, the APP calling the repaired program segment via the address of the repaired program segment. Correspondingly, the present invention further discloses a device for dynamically repairing an application and a related system.