The present disclosure discloses a gesture recognition system. The gesture recognition system includes a processor configured to send a pulse signal and recognize corresponding hand gesture command according to an algorithm, an ultrasonic generator configured to receive the pulse signal sent by the processor and then send an ultrasonic wave, and a microphone including a signal pick-up unit configured to receive the ultrasonic wave reflected by a target object and generate a reflected signal and a signal processing unit configured to compare the reflected signal and the pulse signal so as to generate time data and frequency shift data, and then transmit the same to the processor. The present disclosure also provides a gesture recognition method. The gesture recognition system and the gesture recognition method using the system solve the problem of requirement on high-frequency sampling and data transmission, and thus high power consumption and large bandwidth occupation.
