Agent-based simulation is one of promising approach to understand and design complex socio-economics systems. The U-Mart project is a research and education program of providing economists and computer scientists with an artificial market, an agent-based or hybrid gaming simulation system of financial market as a test bed for interdisciplinary study. The U-Mart project has three areas of activities, which are research, open experiments (events) and education. These three areas are deeply related to each other. It means that it places value on educational activities as well. This paper introduces an overview of the U-Mart project and system, furthermore, reports the case with the educational gaming and the result.