While the topic of online knowledge sharing services based on Web 2.0 has received considerable attention, virtually all the studies dealing with online knowledge sharing services have neglected or given cursory attention to the users’ perception regarding the usage of those services and the corresponding level of interaction. This study focuses on users’ different attitudes and expectations toward the domestic online knowledge sharing service represented by Korea’s ‘Jisik iN’ (translation: knowledge iN) of Naver and a foreign counterpart of online knowledge sharing service represented by Wikipedia, which are often presented as a model of Web 2.0 applications. In Korea, the popularity gap between Jisik iN and Wikipedia drops a hint of the necessity in grasping which factors are more important in allowing for more users’ engagement and satisfaction with regards to the online knowledge sharing service. This study presents and suggests an integrated model which is based on the constructs of WebQual, subjective norms, and cultural dimensions.