The embodiment of the invention provides an equipment reset notification method and an equipment reset notification system, a service and grouped data gateway and a mobile management network element. When the grouped data gateway is reset, the service gateway sends a notification message to the mobile management network element, and the mobile management network element sets relevant user-carriedcontext information as invalid or deletes the information; when the mobile management network element is reset, the service gateway sends the notification message to the grouped data gateway, and thegrouped data gateway sets user context information relevant to the mobile management network element as invalid or deletes the information; and when the service gateway is reset, the grouped data gateway sends the equipment-level identification of the mobile management network element to the service gateway, and the service gateway reestablishes carrier according to the equipment-level identification and the grouped data gateway. When one network element in a network is reset, the reset information is notified to other network elements to carry out corresponding processing; moreover, user context information of network elements can be restored through reestablishing public data network (PDN) connection or reattachment and the like to guarantee service quality.