Users can use social networking sites automatically, it comes from user's habit, it's a no-conscious action (Wohn et al., 2012). Therefore, users have interactions in social network sites, it makes life well-being. At the same time, it creates positive effects. For the reason, there are more and more people who like to participate in social networking sites. In the research, the study tries to use the concept of social capital theory to build a Mobile App system that is conform the good design principle and possesses the capability of transferring social capital through internet interactions.