The purpose of this study is to investigate the effects of over-drive, number of probing test, contact force and probe tip length on the structural strength of probes for wafer test. Taguchi methods were applied to design the experiments using probes with various combinations of over-drive, contact force and probe tip length so as to find out the key parameter in determining the structural strength of a probe. A commercial fine element analysis (FEA) code, ABAQUS, was employed to simulate the mechanical behavior of the probe during wafer testing with various combinations of probing parameters. The von Mises yield criterion was applied to asses whether a probe was failed based on the stress analysis results of FEA modeling. Another set of probing test was conducted to find out the proper combinations of probing parameters to survive 500 or 50,000 times of probing test.