Considering the major shipper choice factors of potential demand, charge sensitivity and service cost coefficient, the paper analyzes the dynamic evolution of co-opetition mechanism among shipping service resources. A number of interesting results are obtained: when the strategy profile moves from perfectly competition to perfectly co-operation, the optimal charge will increase while the improvement of shipping service is uncertain; because long-term equilibrium state is perfectly competition strategy profile, there is a need for appropriate institutional arrangement to reduce the saddle-point position in order to achieve maximize profit for the overall shipping service resources.