An apparatus for circulating and filtering the pool water and a method of circulating and filtering the same are provided to overcome the problem where the purification effect of the conventional water circulation and purifying system is low as it cannot filter the deposition from the cultivation pool. The method includes a water drawing member configured to draw water from a cultivation pool to allow the water to pass through a filter and to flow into a tank, spacing a water outlet of the tank from the water level of the pool water in a height, spacing the water level of the pool water from the bottom of the cultivation pool at a depth, and making the water in the tank flow from the water outlet to the cultivation pool. The height is of a ratio to the depth. The ratio is not smaller than a predetermined value of 2.一種水池循環過濾方法及其系統，用以解決習知水循環淨化系統無法過濾養殖池中的沉積物，導致水質淨化效果不佳的問題。該方法係：以一汲水組件汲取一養殖池中的水液，並使該水液通過一過濾件及注入一槽體；該槽體的一排水口至該養殖池的液面之間具有一相對高度，該液面至該養殖池的底部之間具有一相對深度，該相對高度與該相對深度具有一比值，且該比值不小於一比例門檻值，該比例門檻值係為2；及該槽體中的水液由該排水口注入該養殖池中。
