During a sever earthquake happened in a metropolis, it can be expected innumerable buildings will be damaged, lifelines can be broken and also fire may spread after earthquakes. The safety of residents can be assured after they escape from houses and stay at open-spaces. From the experience of earthquakes, some problems can be identified which are the wide area or spaces and facilities that arranged to provide the space for fire-fighting, rescue and emergency medical care, recovery and rehabilitation, accept rescue teams and volunteers from other area might not enough and lack of a god planning. For this reason, it is worth to study the evaluation norm for disaster-prevention parks which can provide residents shelters and the open-spaces and facilities during emergency in Taiwan. This paper constructs the evaluation norm from three roles of disaster-prevention park that include (1) shelters, (2) bases for emergency activities in disaster, (3) spaces for mitigation and prevention of disaster. The function of evaluated norm can be summarized as follows: analyzing the relationship of process between (1) the dangerous degrees of outside areas and streets, (2) the safety of earthquake-resistant in inner facilities, (3) the efficiency of supporting for emergency activities. According to the three evaluation norms we can construct flowchart and items. Hence, the flowchart and items could be recommended to local government to plan a new park, renew old parks then achieve Safe and Disaster-preventing City.