Abstract: technological convergence is the driving force of new industry emerge and development. It has great significance to analysis the breadth and depth character of technological convergence. This paper propose a technological convergence analysis framework based on patent data, which including both static and dynamic analysis. Then use global 7894 biochip industry patents, investigated biochip technological convergence structure, matrix and also dynamics. Results shows: biochip industry is the result of convergence between biotechnology and information technology; biochip ten element technologies closely convergence with each other; from 1998 to 2008, biochip technology convergence rate increasingly deepen, it gradually become stable until 2009 which means technology convergence paradigm is shaped and technological convergence trajectory become more and more steady, new industry emerge base on technological convergence.