The invention provides a vehicle control method and system, and a vehicle. The vehicle control method comprises detecting the water temperature of an engine; determining whether the water temperature of the engine is lower than the first preset temperature; controlling a continuously-variable valve lift system to adjust the valve lift to the maximum lift and adjusting the air inflow of the engine through a throttle in dependence on the current operation condition of the engine when the water temperature of the engine is lower than the first preset temperature; and controlling the throttle to be adjusted to the maximum opening degree and adjusting the air inflow of the engine through the continuously-variable valve lift system in dependence on the current operation condition of the engine when the water temperature of the engine is larger than or equal to the first preset temperature. According to the invention, the air inflow of the engine under a plurality of conditions can be optimized, and therefore the working efficiency of the engine is improved.