Since the charges and spins of electrons interacts with one another in various materials, sometimes phase transitions occur towards the magnetism, the charge order, or the superconductivity etc as a result. The quantum fluctuation tends to destroy such orders. The interplay of the quantum fluctuation and the interactions recently yielded novel charge orders and high-Tc superconductivity in the strongly correlated electron systems and the molecular conductors. We research the mechanisms of these interesting phenomena observed at SPring-8 using numerical simulations.