Dr. Lee started his career in urban development management department and worked on many cities, i.e., industrial cities, education cities, and new cities from 1985. He learned while working and he applied what he learned to his work. While studying Commuter Science, he tried to build Ubiquitous City (Smart City). He also worked as an urban planning master and doctor and contributed to the construction of advanced infrastructure and IT center building. He also provided excellent wisdom for financial affairs and marketing through RITs education.