Abstract: Enterprises use network competence to acquire new key knowledge from external network. That could promote service innovation and improve innovation performance. In order to reveal the effect mechanism among network competence, knowledge acquisition and service innovation, 298 sample data and structural equation model are used for empirical research. The results are as follows:firstly, resource management competence and relationship management competence both have positive effect on knowledge acquisition, but network planning competence has no significant effect on knowledge acquisition. Secondly, network size negatively moderates the effect of resource management competence on knowledge acquisition, and positively moderates the effect of relationship management competence on knowledge acquisition. Finally, using network competence to acquire external knowledge, enterprises could improve the financial performance and non-financial performance of their own service innovation. The results reveal that enterprise managers should make full use of network competence according to enterprise external network, acquire new key knowledge from the partner network, and promote their service innovation and improve performance.

Key words: service innovation performance, network competence, network size, knowledge acquisition