A system including a vehicle and an external server, the vehicle comprising: a communication device configured to communicate with the external server through at least one of a plurality of channels; and a vehicle control device configured to control the communication device to receive a safety-related message from the external server, wherein the plurality of channels includes a first channel that is allocated to transmit and receive the safety-related message, and wherein the vehicle control device is configured to control the communication device to receive the safety-related message from the external server through a second channel that is different from the first channel, wherein the second channel is allocated to transmit and receive a service message, wherein the vehicle control device is configured to receive the safety-related message from the external server through the second channel rather than the first channel based on a predetermined condition being satisfied while the communication device is set to the second channel, characterized in that the vehicle control device is configured to control the communication device to transmit a request message for requesting the safety-related message from the external server through the second channel based on the predetermined condition being satisfied while the communication device is set to the second channel, wherein the request message includes information for requesting a message related to the safety of a third-party vehicle present within a certain distance from the vehicle and location information of the vehicle, the safety-related message includes location information of a vehicle that has transmitted a message, and wherein the external server is further configured to: determine the message related to the safety of the third-party vehicle present within the certain distance from the vehicle on the basis of the location information included in the request message and the location information related to the safety-related message; and transmit the determined message through the second channel through which the request message has been received from the vehicle, and wherein the certain distance varies depending on at least one of a driving state of the vehicle and traffic conditions. a communication device configured to communicate with the external server through at least one of a plurality of channels; and a vehicle control device configured to control the communication device to receive a safety-related message from the external server, wherein the plurality of channels includes a first channel that is allocated to transmit and receive the safety-related message, and wherein the vehicle control device is configured to control the communication device to receive the safety-related message from the external server through a second channel that is different from the first channel, wherein the second channel is allocated to transmit and receive a service message, wherein the vehicle control device is configured to receive the safety-related message from the external server through the second channel rather than the first channel based on a predetermined condition being satisfied while the communication device is set to the second channel, characterized in that the vehicle control device is configured to control the communication device to transmit a request message for requesting the safety-related message from the external server through the second channel based on the predetermined condition being satisfied while the communication device is set to the second channel, wherein the request message includes information for requesting a message related to the safety of a third-party vehicle present within a certain distance from the vehicle and location information of the vehicle, the safety-related message includes location information of a vehicle that has transmitted a message, and wherein the external server is further configured to: determine the message related to the safety of the third-party vehicle present within the certain distance from the vehicle on the basis of the location information included in the request message and the location information related to the safety-related message; and transmit the determined message through the second channel through which the request message has been received from the vehicle, and wherein the certain distance varies depending on at least one of a driving state of the vehicle and traffic conditions. determine the message related to the safety of the third-party vehicle present within the certain distance from the vehicle on the basis of the location information included in the request message and the location information related to the safety-related message; and transmit the determined message through the second channel through which the request message has been received from the vehicle, and wherein the certain distance varies depending on at least one of a driving state of the vehicle and traffic conditions.