The determination method of solution on Pell equation x~2-aby~2=-1

The solubility of Pell equation x2-Dy2=-1(D is a non-square positive integer)is a very meaningful question.In this paper,it works out a determination method with the set of Pell equation x2-aby2=-1(a≡b(mod 4),a,b are prime factor,and a≠b).