Due to the fact that Taiwan is located at the typhoon invasion path of the Western Pacific Ocean, typhoon is one of the four major meteorological calamities of Taiwan (typhoon, plum rains, cold current, the universe drought), which causes huge financial and human life loss during the summer season. However, the rainfall during the typhoon season is one of the main sources of our livelihood water. Experiencing huge damage from Thelma typhoon (賽洛馬) in the 70's to Toraji typhoon (桃芝) and Nari typhoon (納莉) recently, Taiwan Central Government recognizes that a single and unified conductive, and interconnected structure consisting of a relief language for communication, a flexible and modulated disaster command system (ICS) is desperately required to perform efficiently its maximum rescue capacity at disaster scenes. From case study of Katrina hurricane disaster in U.S., current research discusses the performance of U.S.A. governmental ICS, analyzes the operational pros and cons of ICS at disaster scenes, and evaluates the feasibilities on Taiwan governmental ICS in order to reduce damage during the typhoon seasons.