The XPS and XAES spectra of the cadmium seleniophosphate (CdPSe3) single crystals have been measured, at room temperature, using Al K alpha (1486.6 eV) X-rays source. The analyzed core level XPS spectra of the CdPSe3 compositional atoms have emphasized the absence of non-equivalent atoms in this compound. The cadmium 4d levels show a localized character according to the so-called transition-metal weakly interacting model. As regards the XAES spectra, the selenium L23M15M45 and cadmium M45N45N45 Auger series have been investigated and the nature of the Cd-Se bond has been analyzed by calculating the Cd modified Auger parameter in CdPSe3. The deduced Cd modified Auger parameter shift agrees well with the CdPSe3 energy bandgap E-g.