Group buying has been a popular way of online shopping pattern in recent years. Thanks to rapid growing of artificial intelligent devises, user behavior of requirement has been changed from electronic ecommerce and extended to mobile services. Characteristics of mobility are positioning, personalized and just-in-time. This study takes Service Experience Engineering (S.E.E) as solution approach to development the work model which consumer requirement of product preferential was proposed by service modeling to turn the requirement into service function. By using service blueprint to demonstrate service function, it can clearly represent operation function and inner supporting activities within interactive boundary. Therefore, the main idea of this study is to build up mobile group buying system turning the service function into a system development framework.