Virtual World have continued on a discussion as social spaces which is organizing new relationship with the development of Internet-based technologies. In case of a game had expanded possibility as social spaces from PC to MMORPG based Internet Network since MMORPG(Massively Multiplayer Online Role Playing Game) was launched , . In the same age, there are one of web sites that was both and and These web cites were a success with the advance of SNS as Biz-model on Web. SNS(Social Network Service) has been one of the important points not only to creating developer\'s storytelling but also to generating user generated storytelling through experiencing the contents in game space. Originally, as storytelling being a narrative factor which attract player\'s participation, it has included UGC(user generated storytelling) based on SNS. This study applied the communication theories based on social psychology that it is the elements in a game toward the social network and a new possibility as storytelling. This study considered generating user storytelling\'s prototype and a structure in MMORPG \'s and \'s homepage through the procedure of the study. Also, this study analyzed a point caused the social network which be generated UGC. The second chapter examined the characteristic design toward social network through a player\'s experience which classified both a character\'s role as an agent and character\'s play in connecting the relations in MMORPG. The third chapter involved UGCs from producing and sharing experience which included UGCs as distinguishing and being a character, UGCs as participating and accomplishing a character and UGCs as transforming personal experience. Now a days, SNS is a major topic in web environment, these issues influenced the game design and UGC and so this study has a significant mean that there are the factors in game toward the social network through analyzing UGCs in MMORPG.