This paper describes that activity and strategy for Lean satellite in Kyushu Institute of Technology (KIT) and explain following 3 main works for Lean satellite community. First one is supporting environmental testing in Center of Lean Satellite (CeNT). CeNT provides most of requested environmental testing such as vibration, shock and thermal vacuum to outside satellite developers. Second work is developing satellite in KIT. We are developing 2 Lean satellites as Horyu-4 AEIGS and AOBA-VELOX III. Third work is the establishment of ISO standard relative to environmental testing for Lean satellite. Finally, the future plan will be explained.