Science and technology parks (STPs) are established to promote the firm innovation performance via agglomeration economy and government support in China. On-site qualified firms obtain government R&D funding as a type of government support, and they are offered differential innovation service caused by the differential capabilities of subparks which scatter throughout a single city. It is debatable whether those government supports at firm and sub-park levels can promote firm innovation capabilities. This study takes Zhangjiang National Innovation Demonstration Zone, Shanghai as an example. It applies a Tobit regression model to analyse the databases of Zhangjiang Annual Sampling Survey of Firms 2015 and Zhangjiang Development Report 2015. We find out at the firm level, government R&D funding has a significant and positive influence on firms' innovation, but government R&D funding generates a crowing-out effect the innovation performance of on-site firms with more R&D investment themselves. At the sub-park level, innovation service agencies of sub-parks do not exert an important role in influencing firms' innovation, and they even have negative moderating effects on the relationship 750 |