A wide range of products and services has been commoditized as a result of globalization of the economy, and companies have been increasingly seeking to derive their competitiveness from the knowledge creation of their staff. Social networking among employees is the basis of knowledge creation, and it has been pointed out that if management can support its social networks, it will be able to gain organizational strength. This paper uses the example of a company that has been evaluated highly for its utilization of ICT in business, we analyze the relationship between collaboration network and communication network. Based on the results, we propose how to manage the collaboration network by manipulating communication style.