本研究主要區分為四個階段：第一階段探討水磁化變數對水泥砂漿抗壓強度之影響，第二階段探討哈耳電壓與水磁化變數的關係，第三階段為監測哈耳電壓，並探討水磁化變數對水泥砂漿抗壓強度之影響，第四階段為控制哈耳電壓，並探討哈耳電壓對水泥砂漿抗壓強度之影響。 研究發現磁化水在0.8T之磁場強度中有較佳之成效，可提升水泥砂漿抗壓強度約10% ~ 20 %，0.8T以下磁場強度成效不佳，甚至有可能降低水泥砂漿抗壓強度。添加0.001N 濃度之電解質溶液在0.65T之磁場強度之下磁化就能具有提昇抗壓強度之效果，尤其有以氯化鈉和氫氧化鈣效果最佳。哈耳電壓能充分反應出磁化水磁化變數的改變，且趨勢與理論公式相符，哈耳電壓在30mV以上皆有良好成效。水質特性的量測上，表面張力低於58 dyne/cm 以下之磁化自來水，皆有良好之抗壓強度成效，高於58 dyne/cm以下之磁化自來水則無。 There are four stages in this research: (1) We study the effect of magnetic water on compressive strength of mortar. (2) To observe the relationship between the Hall voltage and the magnetic water variables. (3) We study the effect of magnetic water variables on Hall voltage and compressive strength of mortar. (4) We study the effect of the compressive strength of mortar mixed with magnetic water at the same Hall voltage value. The compressive strength of mortar mixed with magnetic water of 0.8 T, which could increase 10 ~ 20% more than those mixed with tap water samples. However, when the magnetic strength was less than 0.8T, it could reduce the compressive strength of mortar. Therefor, we magnetize 0.001N sodium chloride solution and 0.001N calcium hydroxide solution, which could increase the compressive strength of mortar. The trend of Hall voltage on this experiment corresponded with Hall effect theory. When Hall voltage was above 30mV, the magnetic water increased the compressive strength of mortar. If the surface tension of magnetic water was below 58 dyne/cm, it could increase compressive strength of mortar. On the other hand, when the surface tension of magnetic water was above 58 dyne/cm, it was ineffective.