Abstract: The occurring frequencies of floods, landslides, debris flows and other geological disaster events are increasing in recent years. As a result, the risk management and evaluation of geological disasters attract more and more attention. It is important to understand the geomorphic processes and the knowledge of disaster events occurred in the past for assessing natural hazards. It is a foundation of carrying out the disaster risk assessment and analysis to get the information of temporal and spatial distribution of historical disasters. Treering data are characterized by the accurate dating, strong continuity, high resolution and being easy to copy. Treering method can be used to precisely determine the time of occurred floods, landslides, debris flows and other geological disaster events. Compared with the historical record method and lichen measurement method, the treering method has the potential to get the information of spatial distribution, occurrence frequency and seasonality of disaster events occurred in the past.