Since the Quanzhou Bay Song Dynasty shipwreck was buried in a marine environment for more than 700 years, the physical and chemical properties of wood have been changed and there is a large amount of salt in its hull. The special state of the shipwreck is thus different from that of usual wooden relics, so it is very necessary to carry out a study of suitable preservation conditions for the hull. In view of the special state of preservation of the shipwreck, a series of experiments was carried out, including a salinity stability test, observation and analysis of moisture content and dimensional stability of different wood samples under different humidity conditions and the impact of temperature changes on the woods. Based on the results of these experiments and considering factors such as energy economy and the climate in Quanzhou region, it is concluded that 1) the upper limit of temperature in the exhibition hall should be 27 ℃ in summer and 25 ℃ in the rest of the year; 2) the relative humidity should be controlled between 50% and 60%, and the change range is safe and reasonable should the extent of variation be kept within 5%.