An IP multimedia subsystem, 'IMS', server, comprising: a processor; and a memory operatively connected to the processor, wherein the memory stores instructions that, when executed, cause the processor to: determine whether a first user equipment and a second user equipment exist in one mobile edge computing, 'MEC', coverage based on location information received from the first user equipment and the second user equipment; determine that IMS data to be transmitted and received between a first user equipment and a second user equipment can be processed by a MEC host taking charge of the MEC coverage when the first user equipment and the second user equipment exist in the MEC coverage; instruct the MEC host to activate an IMS processing function; and transmit an address of the activated IMS processing function of the MEC host to the first user equipment and the second user equipment, wherein the address allows the first user equipment and second user equipment to exchange IMS data through the MEC host by transmitting data to the address, wherein the instructions further cause the processor to: receive a message that means deviation from a MEC coverage supported by the MEC host from the first user equipment or the second user equipment; and deploy the IMS processing function from the MEC host to the IMS server based on the reception of the message, wherein an operation for the deployment comprises transmitting an address of the IMS processing function of the IMS server to the first user equipment or the second user equipment, wherein the address of the IMS processing function comprises an address of a media server which takes charge of the IMS processing function in the IMS server. a processor; and a memory operatively connected to the processor, wherein the memory stores instructions that, when executed, cause the processor to: determine whether a first user equipment and a second user equipment exist in one mobile edge computing, 'MEC', coverage based on location information received from the first user equipment and the second user equipment; determine that IMS data to be transmitted and received between a first user equipment and a second user equipment can be processed by a MEC host taking charge of the MEC coverage when the first user equipment and the second user equipment exist in the MEC coverage; instruct the MEC host to activate an IMS processing function; and transmit an address of the activated IMS processing function of the MEC host to the first user equipment and the second user equipment, wherein the address allows the first user equipment and second user equipment to exchange IMS data through the MEC host by transmitting data to the address, determine whether a first user equipment and a second user equipment exist in one mobile edge computing, 'MEC', coverage based on location information received from the first user equipment and the second user equipment; determine that IMS data to be transmitted and received between a first user equipment and a second user equipment can be processed by a MEC host taking charge of the MEC coverage when the first user equipment and the second user equipment exist in the MEC coverage; instruct the MEC host to activate an IMS processing function; and transmit an address of the activated IMS processing function of the MEC host to the first user equipment and the second user equipment, wherein the address allows the first user equipment and second user equipment to exchange IMS data through the MEC host by transmitting data to the address, wherein the instructions further cause the processor to: receive a message that means deviation from a MEC coverage supported by the MEC host from the first user equipment or the second user equipment; and deploy the IMS processing function from the MEC host to the IMS server based on the reception of the message, wherein an operation for the deployment comprises transmitting an address of the IMS processing function of the IMS server to the first user equipment or the second user equipment, wherein the address of the IMS processing function comprises an address of a media server which takes charge of the IMS processing function in the IMS server. receive a message that means deviation from a MEC coverage supported by the MEC host from the first user equipment or the second user equipment; and deploy the IMS processing function from the MEC host to the IMS server based on the reception of the message, wherein an operation for the deployment comprises transmitting an address of the IMS processing function of the IMS server to the first user equipment or the second user equipment, wherein the address of the IMS processing function comprises an address of a media server which takes charge of the IMS processing function in the IMS server.