Considering that there exist a retail market with one manufacturer and one retailer. We use a Cobb-Douglas bargaining function with bargaining parameters to analyze the equilibrium with manufacturer-Stackelberg and retailer-Stackelberg process. The conclusions are that the wholesale price and retail price rise as the manufacturer's bargaining power increase. Manufacturer's profit increase and the retailer's profit decrease as the manufacturer's bargaining power increase, and vice versa. One will get the first-move advantage with channel power and his profit will be better than without channel power.