A method for an LTE terminal sending an RRC connection re-establishment request, the method comprising: determining, by the LTE terminal according to an occurred scenario, which one of the following types is a failure reason: a radio resource failure, a handoff failure, and a UE-related error; determining, by the LTE terminal, that the failure reason is the radio resource failure when detecting dedicated radio resource configuration failure belonging to RRC connection reconfiguration failure; determining, by the LTE terminal, that the failure reason is the handoff failure when detecting mobile control failure belonging to the RRC connection reconfiguration failure; determining, by the LTE terminal, that the failure reason is the UE-related error when detecting measurement configuration failure belonging to the RRC connection reconfiguration failure, non-access stratum dedicated information configuration failure belonging to the RRC connection reconfiguration failure, or UE-related information configuration failure belonging to RRC connection reconfiguration failure; and initiating, by the LTE terminal, an RRC connection re-establishment request message to a network side, the RRC connection re-establishment request message including a failure cause value indicating the failure reason; wherein the failure cause values corresponding to the types of failure reasons are respectively: the handoff failure's cause value being hoFailure, and characterized in that the cause value of the radio resource failure is rlFailure and the UE-related error's cause value being UE-RelatedFailure. determining, by the LTE terminal according to an occurred scenario, which one of the following types is a failure reason: a radio resource failure, a handoff failure, and a UE-related error; determining, by the LTE terminal, that the failure reason is the radio resource failure when detecting dedicated radio resource configuration failure belonging to RRC connection reconfiguration failure; determining, by the LTE terminal, that the failure reason is the handoff failure when detecting mobile control failure belonging to the RRC connection reconfiguration failure; determining, by the LTE terminal, that the failure reason is the UE-related error when detecting measurement configuration failure belonging to the RRC connection reconfiguration failure, non-access stratum dedicated information configuration failure belonging to the RRC connection reconfiguration failure, or UE-related information configuration failure belonging to RRC connection reconfiguration failure; and determining, by the LTE terminal, that the failure reason is the radio resource failure when detecting dedicated radio resource configuration failure belonging to RRC connection reconfiguration failure; determining, by the LTE terminal, that the failure reason is the handoff failure when detecting mobile control failure belonging to the RRC connection reconfiguration failure; determining, by the LTE terminal, that the failure reason is the UE-related error when detecting measurement configuration failure belonging to the RRC connection reconfiguration failure, non-access stratum dedicated information configuration failure belonging to the RRC connection reconfiguration failure, or UE-related information configuration failure belonging to RRC connection reconfiguration failure; and initiating, by the LTE terminal, an RRC connection re-establishment request message to a network side, the RRC connection re-establishment request message including a failure cause value indicating the failure reason; wherein the failure cause values corresponding to the types of failure reasons are respectively: the handoff failure's cause value being hoFailure, and characterized in that the cause value of the radio resource failure is rlFailure and the UE-related error's cause value being UE-RelatedFailure.