The rapid development of information and communication technology has brought about a great change in the global industry. The birth of a smart phone has created many new businesses with a new paradigm that transcends the time and space that can be accessed anytime and anywhere through ubiquity, portability and wireless connection beyond the concept of time and space. A positive network is created with the rapid growth of social network sites, like Kakao, Facebook etc.. In addition to this, Platform Thinking, a social platform based on the service network, is becoming a big axis of the industry. In order to find out the fun factors among the characteristics of the social platforms and to reveal the fun factors according to the functions of the social platform as fun theories, We will clarify the characteristics and the factors affecting them. This is a study on social platform, which is based on SNS, and we want to study emotional fun factor of social platform. In the preliminary study, it was found that consumers enjoy the fun through video and social games on social platforms. In this study, the four fun elements(Hard fun, Easy fun, Serious fun, People fun) of Nicole Lazzaro are applied to the fun emotion that users enjoy through social platforms. As a result of research, it is possible to utilize various functions of social platform and achievement feeling of uploading videos and photos using various functions(hard fun), curiosity to find new information and new friends(easy fun), satisfaction to receive responses such as 'likes' and 'feelings'(serious fun), communication with reply and answer comments(people fun).