The carrying capacity of resources and environment is an important criterion to study the development potential of regional human-land system and to evaluate the service function of natural ecosystem. Based on systematic combing of the related researches, the carrying capacity of resources and environment is re-recognized as follows: (1) The carrying capacity of resources and environment is the elastic threshold of the mathematical relationship between the supply side of resources and environment and the demand side of regional development in a certain space-time scale, which can be expressed as an equation of state. (2)Constraints such as resource utilization’s upper limit, environmental quality’s bottom line and ecological red line are the master controlling factors for building the comprehensive evaluation model of resources and environmental carrying capacity. (3) Identifying the main control factors, establishing the supply and demand list and defining the supply and demand network are the key links which need to be addressed in the application of the model. (4) The rapid development of modern geoscience technology, system structure modeling technology, geographic detector, system dynamics and other technical methods can provide key technical supports for the practical application of the model. Finally, according to the analysis, a comprehensive evaluation model of the carrying capacity of resources and environment based on the dynamic balance of supply and demand is constructed. Moreover, the model is applied to an empirical study of the typical area in the upper reaches of the Min River, and the elastic threshold of the land resources carrying capacity in the area is dynamically calculated and the carrying condition is evaluated. Based on the dynamic balance of supply and demand, research on the theory and method of comprehensive evaluation of resources and environment carrying capacity can provide a new measuring tool for carrying capacity of regional resources and environment.

Resources and Environment Carrying Capacity, Dynamic Balance of Supply and Demand, Supply and Demand List, Main Control Elements, Elastic Threshold of Carrying Capacity, Theoretical Model