This paper is focused on the disaster rescue system for the 88 Flood Case happened on August 8 of 2009 in Taiwan. Three important variables, including information system, mobilization, and inter-organizational cooperation are used to evaluate the effectiveness of the system. Second hand data in press media are collected and used in this research. Previous research and cased related to this case are also used in comparing the effectiveness of disaster rescue system. It was found that government and civic organizations including communities had room for improvements. The information system should be planned for the purpose of efficient disaster information processing. For example, the disaster information in communities should be processed immediately to the commanders of disaster rescuing organizations. In addition, government should take into account the situations of collapsed communication system when disasters happened. Back up information system such as satellite phones should be prepared. For mobilization function, the disaster rescue center has to be redesigned to have permanent instead of temporary team. Wan-An Air Defense practice should be designed to include disaster rescue function. For inter-organizational cooperation, cooperation mechanism should be created between central and local governments, between local governments, between governments and non profit organizations, and to have international cooperation. In practice, incentives should be created to form a cooperative networking to increase the effectiveness of disaster rescue.