9. The voice control method of claim 8 , wherein the step of performing the speech command recognition comprises: determining the recognized speech command according to at least a predefined command set which is consistently used during the speech command recognition.
8. A voice control method performed by a mobile device, comprising: performing speech command recognition to output a recognized speech command; processing sensor data generated from at least one auxiliary sensor to determine a motion of a mobile device comprising the voice control device, to generate a detection output; and referring to the recognized speech command and the detection output to decide a response of voice control; wherein when the detection output indicates a first motion of the mobile device, the voice control has a first response for the recognized speech command; and when the detection output indicates a second motion of the mobile device, the voice control has a second response for the same recognized speech command, where the second motion is different from the first motion, and the second response is different from the first response.