Abstract: The flood disaster information has many characteristics such as frequent updating,various sorts and huge contents.A flood disaster evaluation optimal system was established with MVC software exploitation mode and AAF.The flood disaster can be estimated quickly and through multi－aspects by the system.Aiming at the difference of the results,AHP method was introduced in this paper and it established a general optimal model which re－optimized the multi－types estimation results．The model presents a more scientific method for fighting flood and decreasing disaster decision－making.The system is very stable and creditable and the optimal results are more comprehensive and representative by experiment．