Satellite Technology Research Center(SaTReC) of Korean Advanced Institute of Science and Technology(KAIST) has started a collaborative research, development, and training program in the field of space technology. As the result of that, SaTReC has successfully developed and operated the KISTAT-1, which is the first Korean satellite system. From the experience gained. SaTReC has developed the KITSAT-2 with its own technology and man-power and acquired the capability to design and to manufacture small satellite systems. In this paper, an overview of KITSAT-1/2 microsatellite systems and operational results are introduced.