Abstract: In the complex system existing masking agents, others presented the theoretical possibility of calculation the pHof the forming cnoditions of sparingly solution compound, but it is difficult to find a solution of the equation after the values of all the parameters are substituted,especially by mannual calculation if high order equations are involved.In this paper, application of computer can solve a number of complicated problems like the aforesaid. For this purpose we adopted BASIClanguage which did not demand operation and drawing up programs from this, we arranged commonly used program and calculated the pHand obtained results consistent with experimental values.