The lofty goal in the studies of superconductors is to achieve superconductivity at room temperature. Metallic hydrogen is believed to be such a material with room-temperature superconductivity. However, metallization of hydrogen is still debates in laboratory. As an alternative, hydrogen-rich compounds are extensively explored which are expected to become a new member of superconductor family: hydrogen- based superconductor. We have explored extensively the crystal structure and superconductivity of new sulfur hydride H3S and other hydrogen- rich materials under high pressure by means of the first principle calculation and in situ high pressure experimental measurements. It was predicted at first time that H3S with Im-3m symmetry theoretically by our group to be a high-temperature superconductor with Tc reaching as high as 200 K at high pressure, which has been confirmed experimentally. Furthermore, other hydrogen-rich materials, such as disilane, were also found to be high-temperature superconductors at high pressures.