The theory and concepts of nonlinear dynamical systems have rapidly extended into the geomorphological field so that more and more geomorphologists have investigated landforms by the knowledge structure and thinking mode of nonlinear dynamic systems theory.Nowadays, it is realized that many geomorphic systems exhibit nonlinear or chaos behaviours and patterns in both spatial and temperal domains. This complexity can arise from none quilibrium of landscapes, diversification of components of the system, and change ability of external environment. In fact, basic concepts of nonlinear dynamical systems theory, for example, equilibrium, dissipative structure, bifurcation and chaos, can correspond to some fundamental ideas of traditional geomorphology, principles and ideas of classic geomorphology, therefore, can be illustrated in the context of nonlinear dynamical systems theory framework.