The Experience Sampling Method (ESM), a research technique, was initiated to understand human experience and behavior upon a certain subject. This subject can be a commercial product, a period of time or even the quality of our lives. The mostly used pattern in the ESM is questionnaire, a common example of which can be customer satisfactory survey. During the past three decades, the technology used in this kind of research has changed dramatically: from primitively written on paper to vividly popping up in your modern devices [1]. Therefore, a new approach called Mobile Experience Sampling has been developed, which relies on the ubiquitous computing technologies to collect data. Among these technologies, there is an emerging star— social network. Nowadays, everyone is networking, not really by actual socializing but via countless social network sites: Facebook, Twitter, LinkedIn, etc. Life details are generously shared on these sites: what they do, where they go and, of course, how they feel. As the user population rockets, this special kind of sites has potentially become an ideal source for information/data collection of Experience Sampling. In this paper, quantitative and qualitative research methodologies are combined with the ESM to study the influence of social network on Mobile Experience Sampling. The study shows that the social network sites significantly affect the response and participation rate in the Mobile Experience Sampling experiment designed by the researcher, which indicates its influence on articipants compliance and motivation levels.