A subscription transfer method performed by a subscription manager - secure routing, SM-SR, module, the method comprising: receiving a subscription transfer request message sent by a first user equipment UE or a second UE, wherein the first UE is a target UE to which an embedded universal integrated circuit card eUICC subscription is transferred, and the second UE is a source UE from which the eUICC subscription is transferred; and transferring the eUICC subscription from the second UE to the first UE according to the subscription transfer request message, so that the first UE accesses an operator network according to transferred eUICC subscription data; characterized in that: the transferring the eUICC subscription from the second UE to the first UE according to the subscription transfer request message comprises: sending a subscription transfer notification message to a device in a mobile network operator MNO network, wherein the subscription transfer notification message comprises identity information of the first UE and identity information of the second UE, so that the device in the MNO network replaces the identity information of the second UE in the subscription data with the identity information of the first UE; receiving a subscription transfer acknowledgement message fed back by the device in the MNO network; sending an operational profile OP request message that comprises the identity information of the first UE and the identity information of the second UE to a subscription manager - data preparation SM-DP module, so that the SM-DP module replaces the identity information of the second UE corresponding to an OP with the identity information of the first UE to obtain an updated OP; and receiving the updated OP sent by the SM-DP module, and sending the updated OP to the first UE. receiving a subscription transfer request message sent by a first user equipment UE or a second UE, wherein the first UE is a target UE to which an embedded universal integrated circuit card eUICC subscription is transferred, and the second UE is a source UE from which the eUICC subscription is transferred; and transferring the eUICC subscription from the second UE to the first UE according to the subscription transfer request message, so that the first UE accesses an operator network according to transferred eUICC subscription data; the transferring the eUICC subscription from the second UE to the first UE according to the subscription transfer request message comprises: sending a subscription transfer notification message to a device in a mobile network operator MNO network, wherein the subscription transfer notification message comprises identity information of the first UE and identity information of the second UE, so that the device in the MNO network replaces the identity information of the second UE in the subscription data with the identity information of the first UE; receiving a subscription transfer acknowledgement message fed back by the device in the MNO network; sending an operational profile OP request message that comprises the identity information of the first UE and the identity information of the second UE to a subscription manager - data preparation SM-DP module, so that the SM-DP module replaces the identity information of the second UE corresponding to an OP with the identity information of the first UE to obtain an updated OP; and receiving the updated OP sent by the SM-DP module, and sending the updated OP to the first UE. sending a subscription transfer notification message to a device in a mobile network operator MNO network, wherein the subscription transfer notification message comprises identity information of the first UE and identity information of the second UE, so that the device in the MNO network replaces the identity information of the second UE in the subscription data with the identity information of the first UE; receiving a subscription transfer acknowledgement message fed back by the device in the MNO network; sending an operational profile OP request message that comprises the identity information of the first UE and the identity information of the second UE to a subscription manager - data preparation SM-DP module, so that the SM-DP module replaces the identity information of the second UE corresponding to an OP with the identity information of the first UE to obtain an updated OP; and receiving the updated OP sent by the SM-DP module, and sending the updated OP to the first UE.