Abstract: The optimize choice of region water resource planning scheme is a process with multi-attribute and group decisionmaking (MAGDM).On base of summarizing the recent research of this field, the conception of MAGDM is put forward and a grayed classified function including six kinds of data is built.The decision-making model includes the basic layer (A), expert layer (B) and the high-manage layer (C), meanwhile the concrete calculation step is explained.The current program is reality in Excel.The calculated result of the case shows that this model reflects the process for optimium choice water resources planning scheme.The thought of how to solve the model is clear and its conclusion is reasonable.This research result is both original in theory and valuable in practice for choosing to optimum water resource planning scheme.