The purpose of this research is to determine whether customer loyalty is a significant factor for the growth and survival of the business. This research focuses on the relationship between brand image, customer satisfaction and loyalty. It was conducted in the form of survey. The sample of this research mainly focuses on smartphones' users in Tainan city in Taiwan. 360 surveys were handed out, 309 of them were viable for the research purpose. The result of this research shows that the image of the brand has a positive impact on customer satisfaction as well as brand loyalty. Customer satisfaction also has a positive impact on loyalty. Customer satisfaction, however, is significantly partially mediated with brand image and loyalty. Therefore, according to this research, businesses must have its own unique characteristics and have a strong image brand in order to compete at the top of the industry. Businesses must also provide the best quality products to its consumers to increase customer satisfaction as well as consumers willing to buy. Lastly, this research also provides possible proposals for further investigation.