本篇論文主要討論具有比率相關之捕食系統 , 我們主要探討此類系統正 的局部漸近 穩定均衡點的整體穩定性 。 我們利用 Poincar\'e-Bendixson 定理 、 Dulac's 準則 及極限環穩 定性分析法得到整體穩定性之充分條件 。 The main purpose of this paper is to study the global stability of the positive locally asymptotically stable rest point in a class of predator-prey systems with ratio-dependence. We apply the Poincar\'e-Bendixson theorem, Dulac's criterion, and the method of limit cycle stability analysis to establish sufficient conditions for the global stability.