Based on the concept of collective intelligence, this study conducted an ethnographic investigation on the user experience and collective intelligence of online script kill game users, focusing on the Chinese MZ generation. The purpose of this study is to help understand the collective intelligence of game users by understanding in detail the interaction and communication patterns within the online script kill game, focusing on the Chinese MZ generation. In this study, we applied the ethnographic approach to understand the interaction and collective intelligence within the online script kill game. The research results are as follows. Firstly, script selection is shaped by various reasons and factors, with genres that provide enjoyment and emotional impact being popular. Secondly, users experienced collective intelligence in various ways within the game, including positive experiences that facilitated communication and interaction, as well as negative experiences related to the absence of voice chat and harassment stemming from sexual appeals. Thirdly, users recognized that it was necessary to improve the usage culture, feedback system, and strengthen script quality and consistency in order to overcome negative experiences. The quality of games must be improved by improving the interaction between users, game creators, and script writers. In addition to helping us understand collective intelligence in online games, including online script kill games, it is expected to contribute to online game developers finding ways to improve game systems and promote interaction between users.