Hydrogen-rich materials which are potential high-temperature superconductors, and also believed to be an effective way to the metallization of hydrogen, have attracted significant interest in lots of fields, such as physics, material science and so on. Recently, the discovery of high-pressure superconductivity of sulphur trihydrides (H3S) has set a record at 200 K and attracted wide attention. What makes the H3S so specical? Its high Tc, simple crystal structure, novel density of states that H3S will be potental high tempreture superconductor, and inspired further efforts to research the superconductivity of hydrogen-rich materials. During the last two years, the superconductivity, isotopc effect, element doping effect, the inner physical relationship have been studied by means of the high pressure experimental measurements and first-principles calculations. Recently, a consensus has been reached between theroretical and experimental studies that H3S that hardly occur at atmospheric pressure can be formed at high pressure by two main ways: 3H2S→2H3S+S，2H2S+H2→2H3S. In this work, the discovery of high temperature superconductor sulphur trihydrides H3S, the inner relationship between crystal structure, electronic structure and superconductivity, the pressure dependence of isotope?e?ect, the influence of doping on superconducting transition temperature of H3S, and the decomposition of H2S under high pressure have been discussed.