Provided in the present application are a lockset and a locking device. The lockset comprises a lock housing; a lock core assembly, which is arranged inside the lock housing in a rotational manner; and a reverse-locking assembly, which is in transmission connection with the lock core assembly. The lock core assembly comprises a lock cylinder and a lock ruler unit, wherein a first clutch mechanism is arranged between the lock cylinder and the lock ruler unit; a second clutch mechanism is arranged between the reverse-locking assembly and the lock ruler unit; when the second clutch mechanism is in an engaged state, the reverse-locking assembly can move, under the drive of an external force, in a first direction relative to the lock housing for locking, and the lock cylinder and the lock ruler synchronously rotate with the reverse-locking assembly; and when the external force acting on the reverse-locking assembly is canceled, the reverse-locking assembly moves in a second direction opposite the first direction, such that the second clutch mechanism is switched to a disengaged state. By means of the arrangement of the first clutch mechanism and the second clutch mechanism, the lockset provided in the present application can realize key locking and keyless locking, such that the lockset is more convenient to use.