Metal-Organic Frameworks (MOFs) have attracted attention for its application in the water-based heat transformation system. Herein, we report the synthesis of highly crystalline NH₂-MIL-125(Ti) material by two metal precursors such as Ti(iPrO)₄ and Ti(BuO)₄. Both products show an “S”-shaped water adsorption isotherm, but Ti(BuO)₄-derived NH₂-MIL-125 shows higher water capacity (0.68 g/g) than that (0.44 g/g) of Ti(iPrO)₄-derived one regardless of the synthesis method. In a sense of crystallinity, a solvothermal method with static conditions generated more distinct crystalline properties than the one synthesized by a reflux reaction as confirmed from PXRD analysis, UV–vis absorbance spectra and SEM images. Considering it as an adsorbent for the water-based heat transformation system, Ti(BuO)₄-derived sample synthesized by a solvothermal method shows an ideal S-shaped isotherm with a steep rise of water uptake at lower relative pressure (0.550 g/g at P/P₀ = 0.30), which is attributed to narrow triangle apertures and hydrophilic functional groups. This material shows the dynamic water adsorption/desorption cycle without any noticeable weight change. Details of the work will be presented.