針對主動隊列管理(AQM)研究中缺乏系統的理論分析的問題，引入最優控制理論進行分析，得到了主動隊列管理的數學模型，該模型包括兩個差分方程，分別描述隊列長度和平均隊列長度的變化；給定目標函數，以分組丟棄概率為控制變量，將主動隊列管理的優化問題轉化為動態規劃問題，給出優化策略。According to the problems that currently many Active Queue Management schemes are heuristic algorithms and lack of systemic and theoretic analysis. In this paper, the optimal control theory is introduced to optimize the Active Queue Management schemes. A mathematical model on the Active Queue Management is given. This model includes two difference equations, which denote the evolvement of queue length and average queue length respectively. Under certain target function, using the drop probability to be the control variable, the problem of optimizing the Active Queue Management can be convert into a dynamic programming problem. Finally, the optimal approach are proposed.