The importance of keeping forest fire files as original records is discussed briefly,which provides valuable material for the study of forest fire laws and the experience concerning forest fire prevention.

Based on the analysis of the contents and technical characteristics of different scale forest visualization modeling,the design of individual tree modeling,law of stand structure,forest scenery rendering etc.

This article briefly expounded the organism ideology about tending of woods in Germany, the conception of forest organism and the earth organism,and introduced the characteristics of different afforesting methods, which included whole cutting, shelterwood cutting, selective cutting and economic forest on natural law, advocated the afforesting method which used economic forest on natural law.

Research on Generation of Virtual Forest Environments Based on the Law of Stand Growth;