The present report explained the micro-earthquake data processing and analysis system to be utilized for the geothermal exploration. Together with synthesizing the total system and heightening its operability, development was made of functions to heighten and grasp the hypocentral accuracy, and totally six other ones to display and analyze the spatial distribution of hypocenters and other applied seismic distributions. The above functions presently developed are function to relatively calculate the hypocenters, function to evaluate the detecting ability of observation network, function to simulate the evaluation of hypocentral accuracy, function to support the hypocentral calculation with the foregoing functions to which other ones are added to analyze the velocity structural inversion, and functions to display and analyze the time series distribution, plane/sectional distribution, contour diagram and other applied seismic distributions with the foregoing functions to which other ones are added to display and analyze the b-value. Test was run with data observed in Kakkonda geothermal zone. Endowed with practicality, generality and geothermal speciality, a micro-earthquake data processing and analysis system could be structured as a result. 110 refs., 150 figs., 9 tabs.