Based on the characteristics of casualty caused by disasters and the aim of disaster loss evaluation

the basic principles of evaluating value loss of casualty caused by disasters have been given

which consist of the principle of systematization evaluation

the principle of evaluating from the viewpoint of the whole country and society

the evaluation principle based on disaster result

the principle of ’with & without’

the principle combining currency measurement and non-currency measurement and mainly using currency measurement

the principle of not considering sinking cost and the principle based on future profit-earning capability. After giving the hypothesis of casualty caused by disasters and its distribution

the evaluating methods and models of value loss of casualty caused by disasters have been studied by use of human resource value theory. The basic ideology of the method is that

based on the principle of ’with & without’

the value loss of casualty caused by disasters equals the sum of the cost which is given to casualty by society to deal with the people and the difference between the value possibly created by the dead people during the period of "without disaster" and the value possibly created by the people during the period of "with disaster". According to the actual condition of casualty caused by the disasters

using individual value measurement and collectivity value measurement in the human resource theory respectively

the value possibly created by the people during the period of "without disaster" can be calculated. The value possibly created by the people during the period of "with disaster" equals 0

the value possibly created by the injured during the period of "with disaster" equals the product of the value possibly created by the people during the period of "without disaster" and the discount parameter determined by injured degree. The cost which is given to casualty by society to deal with the people need be calculated from the viewpoint of society considering capital time value simultaneously. The study provides a basis for evaluating disaster loss with the same value measure and also makes the system of theory and method for evaluating disaster loss more complete.