CSTI joins the ICS competition fitst held by MITRE called "MITTRE ATT&CK for ICS" in 2020. In the process of participation, we tried to establish testbed based on ICS protocol. We also tried to incorporate multiple ICS simulators to assist Blue Team's Detection, and to establish scenario and the judgement for the evaluation for the competition. We hope that we can provide our experience in participating in MITRE ATT&CK for ICS, so that everyone can understand the difference between IT and OT, and gain public's knowledge of ICS Security.