The fascinating properties one is confronted with in condensed matter physics, e.g. high-Tc superconductivity, are best dealt with a tool, i.e. oxide MBE, that allows for manipulations of materials at the atomic level. Our customized oxide MBE system yields high-quality thin films of complex transition metal oxides, their artificial superlattices, and brand-new materials resulting in novel states of matter, and are even applicable to the material research of complex nitrides.