Balance method is used to determine the temperature under the 293.15 ~ 353.15 K bisphenol A in water, 5%, 10%, 15%, 20% and 25%, the solubility of NaC1 solution. The results showed that BPA solubility increases with temperature increasing, decreases with NaC1 solution concentration increase. Lambda - h, the ideal solution model and equation associated with Apelblat model on the solubility data, the total average relative error is 1.88%, 2.83% and 1.57% respectively, three kinds of model are applicable to ternary system of electrolyte, solubility data can be well associated with BPA.