This research considers a service value creation methodology in IT solution service based on knowledge science. There are many business cases and researche studies of IT solution services. However, these studies do not consider knowledge itself for creating IT solution. The most important issue is how to extract and integrate different kinds of knowledge from different people for effective IT solutions. In this research, we analyze three cases based on knowledge science. The first case relates to the design office concept and MUSE. The other two are IT consulting cases. From analysing these cases, this research shows the importance of “Ba” which is knowledge space for creation the solution, and the importance of extracting explicit knowledge from implicit field knowledge by using meta-knowledge. The service value creation process for IT solution service can be described clearly and applied to various business system effectively by executing the results of this research.
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