Abstract: An equation to estimate the amount of Goldbach numbers no larger than 2N, relating to oddprimes-pair with two different elements, is developed by means of research on the distribution of such odd- prime-pairs. The most conservative estimation of the amount of Goldbach numbers n(G(2n)), no larger than 2N and related to odd-primes-pair with two different elements, is n(G(2n))〉 N (0.956/ln N- 2/N)² when N is sufficiently large; and n(G(2n))→∞ co in accordance with the rule expressed by the inequality as N→∞.