Based upon general physical properties, SPT-N values and the existing of 1600 boreholes data in the Taipei Geotechnical Engineering Data Base System (GEDBS.TPE), the auther defined thirteen engineering geological regions for the Taipei city and constructed the third version of Taipei engineering geological zonation map as well as the depth contour map of adequate bearing layer of Taipei basin. These maps will be helpful in both design and construction works.