Due to the increase of industry competition in recent years, a lot of traditional industries move abroad, one after another, to improve the competitiveness by seeking the cheaper production cost. Scholars studied and probed into the marketing tactics and methods used in automobile industry in the past, but the research of the used-car is quite scarce.The automobile industry of Taiwan had already topped 6 million in 2000; annual revenue exceeded 300 billion New Taiwan dollars; and offer exceed 70,000 employed people. However, joined WTO in 2002, the automobile industry has faced the impact of “reduce tariffs, open import and cancel the self-made rate and taxation preferential treatment”. This impacts causes sizable pressures for operating the automobile industry. The development of the used-car business is closely linked with automobile industry and the economic development of the country. The trading volume of the used-car reduces year by year after creating the peaks of 646,000 cars in Taiwan, 2001. New car price is cheaper after joined WTO, which accession the degradation of used-car sales volume, and it makes the management of used-car business in a more difficult situation. This research is at first, probe into the management predicament faced of used-car business and the consumption characteristic of it; Secondly, analysis the factors of products quality and the brand image of this business; Then, based on the factors we found, construct the model to describe the effects on customer satisfaction and loyalty; Finally, the research reported that there is a mutual interaction between customer satisfaction and loyalty. This finding can be as a good reference information for whom managing or marketing in this business, and we hope it can be used to raise the sales volume and thus the revenue income. Besides, the findings can offer consumers' better cognition to obtain a high-quality product while buying a used-car.