Polaris service is the distributed trading system of incentive knowledge, the system which connects knowledge producers and users. This project enables knowledge producers to earn rewards and users to get higher quality knowledge with lower costs by evaluating the value of knowledge and trading knowledge beyond simply document-sharing services. The biggest advantage of PolarisShare is that it provides incentives according to the extent of each user's contribution and induces a user-centered voluntary and active ecosystem. It provides an environment where knowledge professionals can produce documents on specific topics and share or sell them at free or low transaction fees.