This paper simulates some practical random events flows and the estimating process connected closely with them random and movingly by means of pseudo random number.

• 本文利用伪随机数对某些实际的随机事件流及与之相关的预测问题进行随机动态模拟，以配置消防车数量的预测为例建立了数学模型，编出了计算程序，进行了具体求解。