An information storage system and apparatus relate to the field of automatic control technologies, so as to resolve a problem in the prior art that there is little information that is used for diagnosing a fault and that is stored by using a freeze frame. The system includes at least one subcontroller configured to: obtain a parameter value corresponding to a parameter, and send the parameter and the parameter value corresponding to the parameter to a management controller, the management controller configured to send the received parameter and the received parameter value corresponding to the parameter to a vehicle-intelligent unit, and the vehicle-intelligent unit configured to: receive and store the parameter and the parameter value corresponding to the parameter, where each subcontroller is connected to at least one executor, and the management controller is connected to each subcontroller of the subcontroller. In this technical solution, when a fault is detected, a parameter corresponding to the fault and a parameter value corresponding to the parameter can be stored, and for the parameter, a parameter type and a parameter quantity are not limited. Therefore, compared with the prior art, relatively comprehensive information can be stored.