Abstract: In order to avoid the subjectivity and limitation of the list method, a computing method of advancement degree of difficulty based on genetic algorithm was proposed. It took the evaluating results of technology maturity as the basis, and the maturity status of the technology to be evaluated was visualized to a two-dimensional coordinate figure. An integral formula was established to compute the advancement degree of difficulty. The weights of the integral formula were confirmed through the initiating, choosing, crossing, variation operation of genetic algorithm. The experiments show that the proposed method can get the difficulty degree of the technology from one maturity level to another maturity level objectively and accurately.