Abstract: Based on ecostate-ecorole theory, technological innovation capabilities of nodes are quantitatively measured by analyzing “ecostate” of technological niches, and their potential impacts upon network environment are measured from the perspective of their growth by analyzing “ecorole” of technological niches. With the application of social network analysis, the data on joint applications for inventions and patents in mobile communication terminals from 2003 to 2015 are sampled to analyze the structural evolution laws of the mobile communication terminal innovation network in different periods. It is found that original loose and simple networks have gradually evolved into compact and complicated ones. Subsequently, this paper calculates the characteristic values of the structurally evolved networks, constructs regression models to analyze relationships between network structures and “ecostate” and “ecorole” of technological niches. The empirical results suggest that inverted U-shaped relationships exist between degree centrality and “ecostate” of technological niches. The degree centrality, structural holes and tie strength are also discovered to have such relationships with the “ecorole” of technological niches.