The method of earthquake short-term and impending prediction by using tidal wave (abbr HRTwave method) is a new, quantitative technology of simultaneous determination of the location, magnitude and time of an earthquake.The earthquake preparation processes and precursor mechanism are considered as a "blackbox" .Using the modern control theory in system recognition, we can calibrate this "black box"  mathematically with different input and output parameters.We regard the tidal force as our "input signal"  while geoelectric response to the tidal forces is considered as an "output" .