A method for processing terminal unloading in a system comprising the following network elements: a source Mobility Management Entity; a target Mobility Management Entity; a base station; a terminal; wherein the method comprises the following steps: configuring, by the source Mobility Management Entity, a Globally Unique MME identity, GUMMEI, dedicated for unloading as an unloading source before the load is unloaded; configuring, by the target Mobility Management Entity, the GUMMEI dedicated for unloading as an unloading target before the load is unloaded; sending, from the target Mobility Management Entity, to the base station a MME configuration update request message which contains the GUMMEI dedicated for unloading; detecting, by the source Mobility Management Entity, a user in a connection state; transmitting, from the source Mobility Management Entity, to the terminal a Globally Unique Temporary Identifier, GUTI, redistribution request message comprising the GUMMEI dedicated for unloading; transmitting, from the terminal, to the source Mobility Management Entity a GUTI redistribution completion message; releasing, by the source Mobility Management Entity, the connection between the source Mobility Management Entity and the terminal; transmitting, from the terminal, to the base station a Tracking Area Update, TAU, request message comprising the GUMMEI dedicated for unloading; selecting, by the base station, the target Mobility Management Entity based on the GUMMEI in the TAU request message and forwarding the message to the target Mobility Management Entity; transmitting, from the target Mobility Management Entity, to the terminal the TAU accept message. a source Mobility Management Entity; a target Mobility Management Entity; a base station; a terminal; wherein the method comprises the following steps: configuring, by the source Mobility Management Entity, a Globally Unique MME identity, GUMMEI, dedicated for unloading as an unloading source before the load is unloaded; configuring, by the target Mobility Management Entity, the GUMMEI dedicated for unloading as an unloading target before the load is unloaded; sending, from the target Mobility Management Entity, to the base station a MME configuration update request message which contains the GUMMEI dedicated for unloading; detecting, by the source Mobility Management Entity, a user in a connection state; transmitting, from the source Mobility Management Entity, to the terminal a Globally Unique Temporary Identifier, GUTI, redistribution request message comprising the GUMMEI dedicated for unloading; transmitting, from the terminal, to the source Mobility Management Entity a GUTI redistribution completion message; releasing, by the source Mobility Management Entity, the connection between the source Mobility Management Entity and the terminal; transmitting, from the terminal, to the base station a Tracking Area Update, TAU, request message comprising the GUMMEI dedicated for unloading; selecting, by the base station, the target Mobility Management Entity based on the GUMMEI in the TAU request message and forwarding the message to the target Mobility Management Entity; transmitting, from the target Mobility Management Entity, to the terminal the TAU accept message. configuring, by the source Mobility Management Entity, a Globally Unique MME identity, GUMMEI, dedicated for unloading as an unloading source before the load is unloaded; configuring, by the target Mobility Management Entity, the GUMMEI dedicated for unloading as an unloading target before the load is unloaded; sending, from the target Mobility Management Entity, to the base station a MME configuration update request message which contains the GUMMEI dedicated for unloading; detecting, by the source Mobility Management Entity, a user in a connection state; transmitting, from the source Mobility Management Entity, to the terminal a Globally Unique Temporary Identifier, GUTI, redistribution request message comprising the GUMMEI dedicated for unloading; transmitting, from the terminal, to the source Mobility Management Entity a GUTI redistribution completion message; releasing, by the source Mobility Management Entity, the connection between the source Mobility Management Entity and the terminal; transmitting, from the terminal, to the base station a Tracking Area Update, TAU, request message comprising the GUMMEI dedicated for unloading; selecting, by the base station, the target Mobility Management Entity based on the GUMMEI in the TAU request message and forwarding the message to the target Mobility Management Entity; transmitting, from the target Mobility Management Entity, to the terminal the TAU accept message.