Platooning Controller, System Including the Same, and Method Thereof

A platooning controller is provided. The platooning controller includes a processor configured to perform platooning control when an outside vehicle cuts in during platooning and a storage configured to store information for performing the platooning control. The processor is configured to perform the platooning control based on sensor information of a host vehicle, when the outside vehicle cuts in front of the host vehicle. The processor is configured to determine whether a platooning vehicle which is traveling in front of the host vehicle performs emergency braking, based on communication information received from a vehicle which is platooning in front of the host vehicle.