The purpose of the study was to reduce the losses caused by flood and to prevent them in advance,by taking Laoshan District,Qingdao City as an object.Based on GIS components and the spatial analysis of GIS,we designed an evaluation model to develop flood risk evaluation system for Laoshan District,using factor set,judgment set,membership function,and weight set established by the method of fuzzy comprehensive evaluation.The system can produce assessment results automatically after user enters data,which is classed into high grade,slightly high grade,medium grade,slightly low grade,and low grade.The results obtained by the rating system are most in common with the actual results.Especially,Wanggezhuang street is in the highest grade in the area.With good flexibility and performance,the method of the system can be popularized to general crisis evaluation judge.