This article penetratively analyses the locally asymptotic stability of equilibrium state to the single - variable system of the tumor immunity surveillance model by aid of the ordinary differential equation stability theory 摘要用嚴格的常微分方程穩定性理論,對腫瘤免疲監視模型的單變量系統平衡態的局部漸進穩定性做了深入分析。