We have systematically analysed the ground electronic structures of atomic ions up to the atomic number 95 by the Dirac-Slater relativistic self-consistent field approximation method. The different electronic configuration competitions of atomic ions are discussed and will become the foundation for further theoretical studies. Basing on the smooth variation and the quasi-addition properties of the occupied obital screening constants, we have established the atomic data base of the ground electronic structures of all the atomic ions.