Traditional health risk assessment（ HRA） mainly concentrated on certainty analysis. While uncertainty arose due to multivariation,randomness,timely-variance and nonlinearity from HRA. With its reliability,efficiency and feasibility,Monte Carlo method（ MC）,based on statistics,outstands gradually among nonlinearity system analysis methods to be applied in population in many fields. MC obtains convincing system approximation through random simulations,statistical analysis on test data and sampling from a model with probability distribution hyp...
