Abstract: Through a comparison of the differences between the results obtained by two times of geothermal geophysical exploration con?ducted in different segments of the Ngola Mountain active faulted zone and on the basis of an analysis of regional gravity field and geo?logical structure, the authors, starting with the study of modern tectonic stress field and tectonic deformation, investigated the segmen?ted differences of the role of the Ngola Mountain active faulted zone in Qinghai Province in the control of geothermal and seismic activi?ties. The southern segment of the faulted zone strikes in NNW direction and intersects the NE?trending stress of the Tibetan Plateau at an acute angle and mainly assumes strike-slip nature under the stress component force; the right?lateral pull?apart area controls the cluster distribution of the warm spring groups and has no intermediate and strong seismic activities. In the northern segment of the faul?ted zone, The strike turns in NW direction and is nearly perpendicular to the diection of the stress; under the action of compressive stress, the thrust fault is likely to become causative fault, but possesses no conditions for the formation of warm springs and geothermal fields. This paper investigates the formation mechanism of the warm springs and geothermal fields, emphatically describes the good geo?thermal and geological conditions of the warm springs in Wenquan Town, and also points out that there exists no geological setting for the formation of geothermal fields in the Wulan segment.