A method in which several vehicles, which perform platooning in an autonomous driving system (Autonomous Driving System), pass a target vehicle, in which the several vehicles constituting a platoon include a first vehicle controlling platooning and a second vehicle controlled by the first vehicle, and the first vehicle checks information of the platoon and determines a passing operation of the platoon on the basis of the platoon information received from the server and information about the out-platoon vehicles, thereby being able to control the vehicles performing the platooning to pass the target vehicles. One or more of an autonomous vehicle, a user terminal, and a server of the present invention may be associated with an artificial intelligence module, a drone ((Unmanned Aerial Vehicle, UAV), a robot, an AR (Augmented Reality) device, a VR (Virtual Reality) device, a device associated with 5G services, etc.