Supply chain issues have been given much attention. Various technologies and concepts have been applied to improving and optimizing supply chain performance. However, few methods to explore supply chain inter-relationships, detect process key problems and co-ordinate planning processes in different supply chain partners are available. A Web-based co-ordinated planning process supported by quality function deployment (QFD) approach is proposed in this research. The planning method is focused on integrating planning processes in supply chains by optimizing each planning process and interactively adjusting key parameters in different business processes. The QFD approach is employed to inter-relate different business processes and detect key problems through Internet technique application, so that the global solution can be heuristically improved. The planning method imitates the real-world supply chain planning environment and provides a mechanism for decision-makers to communicate with quantitative information in planning processes through the Web system. An illustrative case study in packaging industry is conducted to describe the planning procedure. The result of the example shows prospect of the method in improving supply chain cooperation. The approach is expected to facilitate supply chain planning and support managers to solve targeted problems more efficiently.