High Energy Hadron-Hadron Scattering

The elastic hadron-hadron scattering at high energies is one of the most fundamental subjects of all particle physics problems and yet is least understood in spite of many advances in quantum chromodynamics (QCD) at the conceptual level. We review here the recent theoretical and experimental status of the subject as well as the rigorous results of the high energy hadron-hadron scattering. Surprisingly enough, the high-energy models for the elastic and diffractive scattering abstracted from the Regge-Pomeron field theory is still {\it phenomenologically} successful to explain the high-energy scattering data though no rigorous derivation out of the QCD is yet available.