The study adopts 3-D laser scan to assist the survey, which supplies the information from monitoring the slope disaster and insures the control and accuracy of the disaster scale quantification, so as to insure the judgment on the slope destroy type and slope coordinate parameter source（without hypothesis or long-term installing the monitoring equipment on site）, and so as to calculate the collapse slope quantity. The errors in assessment of the disaster rescue and emergency response, which are consequent on difficult acquisition or shortage of the slope disaster information, can thus be reduced.
