Abstract: Variation of pressure，temperature and electric capacity is discussed by the experiment of the synthesis and dissociation of NGH based on the two-dimensional experimental system.Furthermore,the experiment on hydrate production by depressurization is carried out.An understanding about dynamic characteristics of parameters and influencing factors are achieved.In the synthesis experiment，electric capacity becomes lower as water volume decreases because of synthesis of NGH.Pressure and temperature difference can be observed during the production by depressurizing，meanwhile，the degree of temperature decrease is higher as the increase of the producers′ spacing.Three parts are observed in the process of production by de

Key words: natural gas hydrate, two-dimension, electric capacity, depressurizing, temperature