This paper explored dynamic impact mechanisms of the change in key role public incubator played. Firstly, we explained the coevolution of emerging industries with different technological innovation oriented and incubators with different marketization degree. Then, we uses VAR model to analyze contribution function of dynamic role between emerging industries and incubators based on incubators in zhongguancun. Results of impulse response function and variance decomposition suggest a two-way dynamic mechanism. Effect of incubator marketization to technological innovation is direct and significant. Effect of technological innovation to incubator marketization lags. Especially public incubator reaction is slow to technology-oriented innovation under the industrial policy restrictions. As a result, we considered incubator should not be limited to a single policy tool, it is also a industrial tool as a emerging entrepreneur service industry. We may pay attention to “policy and industrialization” of incubator complementing and perfecting creativity entrepreneurship environment of emerging industries.