As an aspect of the regional innovation system, the capacity of regional technical innovation reflects the degree of the regional innovation system operation. After studing related papers, we defined the formation mechanism of the ability of regional technical innovation. Based on the analysis on the meaning and structure of the ability of regional technical innovation, we discussed the model of its forming condition and mechanism, found concrete indices to reflect the corresponding factors, and did empirical analysis with the Fuzzy Mathematics. The conclusion reflected that the defined structure and model could explain the circumstance of the ability of regional technical innovation of China