Abstract: An application of the Ultrasound nonlinear reflection is introduced. The structure and design of a double ultrasound pulse-echo wave system are described, and its modulation is explained. The result from experimental modulation is given. Besides, the superimposed wave and its matching modulated spectrum are presented upon experiments. It is shown through experiments that this system has enough distinguishability and responding rate. Thus it may be used to realize the measurement of the temperature distribution and rising in one's tissue without pain.