Based on the theory of stir kinetic energy conversation law proposed by Ouyang Shoucheng, which revealed that energy can not break away from matter and space should be remained for energy, the relationships of energy space and natural disaster and catastrophic dynamics were discussed. The application and countermeasures of energy space in reconstruction after disaster, plan of flood control and disaster reduction, ecological environmental plan and etc. were proposed. It was emphasized that natural disasters and artificial construction project should remain space for energy for effective disaster reduction and prevention. It was suggested that "remaining space for energy"  is the new scientific proposition aim at the modern science's omission.