When the battle of global e-commerce keeps heating up, Taobao has the greatest impact on Taiwan's e-commerce market among all of the ecommerce businesses. Researchers began to study various aspects of Taobao's e-commerce; however, to the best of our knowledge, none of these studies has addressed the comparison between Taiwan's and Taobao's e-commerce, and the core competence analysis of Taiwan's e-commerce. Therefore, our study focuses on these aspects and discusses thoroughly through related literature reviews, internet forums, and our designated questionnaire. For these cases we examine, Taiwan's e-commerce should improve the products quality and the after-sales services to increase the competence, and adopt the differential strategies to seek effectively sustaining competitive advantages. Further, for people in Taiwan to build the customer loyalty and our own e-commerce identity, the crucial key is to increase the core competence of Taiwan's e-commerce.