Hybrid electric vehicle and power system control method thereof

A hybrid electric vehicle controlling a power system by more effectively recognizing entry into a low emission region and a power system control method thereof may include: determining entry into a region in which an amount of exhaust gas is required to be reduced by using image-based road sign recognition information; determining an average size of the type of the region in a case where it is determined by the control unit that the entry is made; and controlling the driving mode to be an electric vehicle (EV) mode until it is determined that the vehicle leaves the area based on the average size. 本发明公开一种通过更有效地识别进入低排放区域来控制动力系统的混合动力电动车辆及其动力系统控制方法，其可以包括以下步骤：通过利用基于图像的道路标识识别信息，判断进入要求减少废气量的区域；在通过控制单元判断为进入的情况下，确定区域的类型的平均大小；以及控制驾驶模式为电动车辆(EV)模式，直到基于平均大小判断车辆离开区域为止。