Abstract
By the computer analysis using the intimacy degree calculation, absorption Markov Chain and Ergodic Markov Chain of stochastic theory it makes grouping how the many fundamental items concerned with the prevention of disaster plan which cut into the smallest pieces function with what sort of connection against every disasters imaginable mutually. Then organized hierarchy which prevention of disaster as a total system. Next, it set up the check factor of efficiency named the index of systematization and the index of dispersion to try quantification for efficiency calculation of the prevention of disaster plan. Therefore it would be possible to make the synthetic prevention of disaster plan which improve the efficiency organically, after due consideration of the cost and make the lowest level that adoptable total prevention of disaster system include the items which is regulated by the lawful prescription.
