Copyright licensing business is one of the most important fields in Publishing between Mainland and Taiwan Cultural communication. In digital publishing environment, digital copyright trading is a new cooperation form between the two sides. The e-book market in Taiwan and Mainland have their advantages and disadvantages. In this paper, we will investigate the digital copyrights of Mainland press. and the authorization's willingness to the Taiwan market by in-depth interviews. The research results show that although the mainland press are willing to cooperation with Taiwan in the field of digital copyright, what they worry about are getting enough profit from the market and the risk of content losing. Finally, the paper give some suggestions to these problems, expecting to provide reference for future cross-strait cooperation in the digital copyright.