We focus on the aggregate (Multi-channel,single-material) multi-cumulative (multi-path with the same toxic mechanism for multi-material)dietary exposure assessment.For the risk assessment with probabilistic approach according to the measure of frequency distribution of skewness,we take non-parametric modelling or parametric modeling by Monte Carlo simulation and Bootstrap methods,and for the parametric modeling we also use Acceptance-Rejection Method and normal and lognormal model.We acquired the distribution of probability density of risk intakes at different percentile and can judge whether they are beyond the critical values.We also designed some GUIs convenient for users.