Larger size TFT-LCD panels, consists of notebook panel, monitor panel, and TV panel, enjoys great growth momentum for years. To fulfill the growing demand, panel makers keep continuous investment for expansion. Therefore, this creates over-supply, under-supply, or balanced supply-demand. Supply and demand decides the price of an item. So does TFT-LCD panel. Through thorough industry historic and forecasted data, complete supply-demand model is built with 2 years forward forecast. The result shows that in the following 2 years the occurrence of oversupply is very possible. However by controlling utilization rate and carefully talking orders, panel makers create shortage-like situation to raise panel price successfully. By the result of this model, accompanied with current global economics situations, some managerial suggestions are given for TFT-LCD makers.