The purpose of the study is to develop mobile support services areas and detail mobile support service items according to their convention activities and analyze user preference. For this aim, a qualitative to extract mobile support service areas and detail mobile service items targeted to convention participants and a expert survey to analyze user preference are used. Firstly, based on a precedent study and expert review 20 mobile service areas and 43 detail service items are extracted. Secondly, results from expert survey are presented exploring user preferences for detail service items designed for convention participants.