In accordance with the specific characteristics of disaster restilted from mudflow and present conditions

the system integration strategy for assessment of mudflow disasters was proposed. The integration system for assessment of mudflow disasters was configured with externally linkage architecture based on the common interface medule and included two components

i.e. GIS and expert system. Thus central link of implementing the integrated system is construction of transformation function

accessing function and specific application frameworks. Transformation functions and accessing functions were performed as Dynamic Link Library so as to be shared by application programs. Application frameworks were expressed by Stepwise Input-Processing-Output graph （SIPO） and constructed by program manager and Multi-Document editor with OLE interface. After database on the Sunhugou watershed and knowledge base for mudflow hazard assessmeht were built up

mudflow hazard on the Sunhugou watershed has been assessed in this paper. Through comparison between field investigation and distribution map for mudflow hazard outputed by the integrated system the result shows that the integrated system is operable and highly reliable.