Although the crossdating technique has been well established and received limited changes in the recent decades,various methods were developed for the tree-ring sciences and for the different applications of the tree rings for global change studies. On one hand, studies on the tree-ring methods focus on extracting the environmental and ecological signals from tree-ring proxies. Tree-ring proxies that are used for the global change studies include the treering width (earlywood,latewood and total tree-ring width),tree-ring density (earlywood,latewood,maximum, minimum density),stable tree-ring isotope(carbon and oxygen) and wood anatomy features. Tree-ring standardization to remove the age-related growth trend is required, particularly for the tree-ring width data, as they are jointly influenced by the age-related growth trend and the environmental and ecological signals. It is still a key concern for the tree-ring method studies to distinguish the age-related growth trend from the target signals. On the other hand, tree-ring methods have been incorporated with methods from various disciplines of global change, generating new methods for these inter-discipline studies. Related to the monitoring studies, the tree-ring data often have longer duration and can provide a more comprehend picture of the environmental and ecological history. Various methods were developed to use the dating information and the features tree-ring width, tree-ring isotope and wood anatomy to reconstruct the past climate change,forest dynamics (e. g. biomass reconstruction and forest disturbances),and geomorphological processes, etc. Although most of the tree-ring researches have been published by Chinese dendrochronologiests nowadays, limited attention has been paid on the investigations of tree-ring methods.