The comprehensive assessment system based on the monitoring information is established to study the stability of slope. Due to the variety of the monitoring data

the stability of the slope can be treated as an attribute space

the attribute recognition theory is used for the comprehensive assessment of rock slope safety

and the fundamental problems such as the standardization of bottom index

the determination of the values of weights

et. al

are researched. A case study is presented which shows that this method can reflect the variety of slope state and the comprehensive result is reliable.