This paper asserts that system dynamic based leaning environment could provide an effective decision support and leaning in complex dynamic task. Experimental research on dynamic decision making and learning in computer simulation-based interactive learning environments is analyzed. A conceptual model encompassing key elements of decision making is constructed. Departing from the traditional dynamic decision-making research focus on how poorly subjects perform in dynamic tasks, our model attempts to increase our understanding of the way in which expertise on dynamic decision making are acquired.