During the recent years, the ROC Armed Forces have successfully performed several major disaster rescues and incorporated disaster relief as a core task under the Armed Forces’ missions. But the task performing in disaster rescue is quite different from military missions. Witnessing dead bodies or remains, service member involved in disaster relief would experience stress reaction and even result in PTSD in some cases. In order to help cope with mental difficulties, military mental health systems have provided a wide array of support to those who were involved and the overall results have also been widely appreciated. This article aims to introduce what and how those mental health workers have done in different stages during the “88 flood” rescue mission.