Abstract: The systems engineering principles were used to identiy the natural and social envirinment in Taishan county with the help of the model of envirinment identification,and the dominant,restrictive and potential envirinment factors were got;the stages of forestry development and the characteristics of forest resources in Taishan county were analysed;furthermore,the forest economical ecosystem in this county was diagnosed by using the model of systems diagnosis,the problems,potentialities,ways,dominance and breaching point were got by opening up this actual system in time and space;finally,the guidelines for the total development planning of forestry in this county were put forward on the basis of the analysis of the above three parts,and the decision analysis on the total development planning of forestry in this county was studied by using the model of analytic hierarchy process,and the objectives,planning regions and measures of the total development planning of forestry were suggested.