This study analyzed the path-change theory, the path evolution, and the path creation concept in the case of the fusion of nano-technology in the existing technology field by the SMEs in the domestic nano convergence material field. A total of 7 companies were selected for the analysis. Among these, 3 companies which are easy to generalize are presented in this paper. In the case of companies showing path dependence convergence patterns, it was understood that keep pace with demand change of connected industries. Next, in the case of companies showing path evolutionary convergence, marketability of existing business areas is unclear. In order to diversify the business, Nano convergence R&D conducted. Finally, in the case of the path creative convergence, SMEs’s nano material technology is used as a key technology to enter the new niche market. Based on the analysis of the causes of such convergence, this study suggest the government's policies for the convergence support.