the five first-class constituent elements of engineering geological environment are analyzed
which include material composition
geological structure
dynamic effect
boundary condition and engineering geological properties;The four assessment information characteristics of engineering geological environment are summarized
then a GIS-based engineering geological environment assessment system workflow is established
which consists of four parts
i.e.Multi-source data system
GIS management system
GIS-based assessment system of engineering geological environment
risk assessment and prevention decision system of engineering geological hazards.After that the importance of assessment information normalization is discussed and two assessing models i.e.hierarchy analysis model and information weight model are introduced
and finally the GIS structure for engineering geological environment assessment is presented.These researches provide a theoretical basis for engineering geological assessment.