The service supply chain consisting of one service vendor (SV) and one service integrator (SI) was studied. The service vendor supplies original service productions or activities to the SI that in turn sells the value-add integration service to customers. Customer service request volume has characterized by a price-sensitive random request volume under market environment. In this paper, we developed information sharing and performance of service supply chain between SV and SI. We tried to explore the information sharing in service supply chain which was classified into different information flows. The supply chain performance based on three different types of information transferring scenario was evaluated. The findings reinforced the importance of information sharing coordination and performance to companies. At last, future research direction was pointed out.