The innovation of technology and product has made uncertain highly of the beginnings of emerging industry. Smart phone industry belongs to emerging industry. The manufacturers in Taiwan of smart phone include HTC, Quanta, Innopac, Asus, and Arimacomm etc. and HTC is the maximum of shipment of smart phone with Microsoft platform. Therefore, it is necessary that we study the purchasing strategies of smart phone industry. The research methodologies applied to this study are literature review, case study and deep interview. It applies purchasing portfolio model to classify components come from different industries, and it is proposed different purchasing strategies. The conclusions of this study reveal as follows: 1. Early Purchasing Involvement (EPI) will help to get external advanced technology resource so that we can improve the competitive advantage of the corporate in emerging industry. 2. Different purchasing strategies and relationship management can be applied to different component industry and suppliers respectively. 3. The performance evaluation, remediation, and selection of suppliers can be adopted into the management cycle in A company, and the standards will depend on industry environment and the resource A company has.