A method for controlling an onboard system in a vehicle, comprising: providing a plurality of sensors mounted in a steering wheel, wherein the sensors are a plurality of ultrasonic sensors; tracking a current gesture of a driver by using the plurality of sensors mounted in the steering wheel; determining a type of the current gesture from preset gesture types based on the tracked gesture; and controlling the onboard system to perform an operation corresponding to the type of the current gesture; wherein tracking the current gesture of the driver by using the plurality of sensors mounted in the steering wheel comprises: obtaining ultrasonic signals collected by the plurality of ultrasonic sensors within a period of time; characterized by selecting reflected signals from the collected ultrasonic signals, wherein the reflected signals are the obtained ultrasonic signals reflected from a hand or a finger of the driver within an active area of the hand or the finger of the driver; and determining the coordinates of a position of the hand or the finger of the driver in the active area within the period of time based on the selected reflected signals, to track the current gesture; wherein the inner side of the circumference of the steering wheel is provided with a plurality of sound holes , the plurality of sound holes are in one-to-one correspondence with the plurality of ultrasonic sensors , and directions of the sound holes are determined based on the active area of the hand or the finger of the driver and coverage of the ultrasonic signals. providing a plurality of sensors mounted in a steering wheel, wherein the sensors are a plurality of ultrasonic sensors; tracking a current gesture of a driver by using the plurality of sensors mounted in the steering wheel; determining a type of the current gesture from preset gesture types based on the tracked gesture; and controlling the onboard system to perform an operation corresponding to the type of the current gesture; wherein tracking the current gesture of the driver by using the plurality of sensors mounted in the steering wheel comprises: obtaining ultrasonic signals collected by the plurality of ultrasonic sensors within a period of time; characterized by selecting reflected signals from the collected ultrasonic signals, wherein the reflected signals are the obtained ultrasonic signals reflected from a hand or a finger of the driver within an active area of the hand or the finger of the driver; and determining the coordinates of a position of the hand or the finger of the driver in the active area within the period of time based on the selected reflected signals, to track the current gesture; obtaining ultrasonic signals collected by the plurality of ultrasonic sensors within a period of time; characterized by selecting reflected signals from the collected ultrasonic signals, wherein the reflected signals are the obtained ultrasonic signals reflected from a hand or a finger of the driver within an active area of the hand or the finger of the driver; and determining the coordinates of a position of the hand or the finger of the driver in the active area within the period of time based on the selected reflected signals, to track the current gesture; wherein the inner side of the circumference of the steering wheel is provided with a plurality of sound holes , the plurality of sound holes are in one-to-one correspondence with the plurality of ultrasonic sensors , and directions of the sound holes are determined based on the active area of the hand or the finger of the driver and coverage of the ultrasonic signals. <EOS>