The invention provides an escape system of a vehicle and a control method thereof, the vehicle, relates to the technical field of the vehicle escape, and is capable of solving a problem in the prior art that a vehicle window is difficultly opened while the vehicle falls into water so that a person in the vehicle is difficult to escape. The escape system of the vehicle comprises a monitoring module, wherein the monitoring module is installed on a vehicle body outside the vehicle, and the monitoring module is used for monitoring a condition that the vehicle body of the vehicle is overflowed by aliquid level; and a control module, wherein the control module is connected with the monitoring module, and the control module is used for, while the condition that the vehicle body of the vehicle isoverflowed by the liquid level accords with a suspected submerging condition, controlling at least one part of the vehicle window to be opened. The escape system is used for the vehicle.