We measured the photoelectron spectra of diatomic AuSi- and AuGe- and conducted calculations on the structures and electronic properties of AuSi-/0 and AuGe-/0. The calculations at the CASSCF/CASPT2 level confirmed that experimentally observed spectra features of AuSi- and AuGe- can be attributed to the transitions from the 3 Sigma(-) anionic ground state to the (2)Pi ((2)Pi(1/2) and (2)Pi(3/2)), (4)Sigma(-), 3(2)Sigma(+), and 4(2)Sigma(+) electronic states of their neutral counterparts. The electron affinities (EAs) of AuSi- and AuGe are determined by the experiments to be 1.54 +/- 0.05 and 1.51 +/- 0.05 eV, respectively. The spin orbit splittings ((2)Pi(1/2)-(2)Pi(3/2)) of AuSi- and AuGe measured in this work are in agreement with the literature values. The energy difference between the (4)Sigma(-) (A) and (2)Pi(1/2) states of AuSi obtained in this work is in reasonable agreement with the literature value, while that of AuGe obtained in this work by anion photoelectron spectroscopy is slightly larger than the literature value by neutral emission spectroscopy. The term energies of the 3(2)Sigma(+) (B) and 4(2)Sigma(+) (C) states of AuSi and AuGe were also determined based on the photoelectron spectra. Because of the different bond lengths between the anionic and neutral states, the electronic state terms energies of AuSi and AuGe estimated from the anion photoelectron spectra might be slightly different from those obtained from the neutral emission spectra.