The invention relates to a method for preparing a water-soluble algae extract. The preparation method comprises: mixing an algae material with an aqueous liquid to prepare a mixture, and subjecting the mixture to high-pressure treatment； Microwave treatment； and separating the water-insoluble solids in the mixture after microwave treatment to prepare a water-soluble algae extract.本發明係關於一種水溶性藻類萃取物之製備方法，該製備方法包括：混合一藻類材料與一含水液體，以製得一混合物，並對該混合物進行高壓處理；對高壓處理後之該混合物進行微波處理；及將微波處理後之該混合物中的非水溶性固體分離，以製得水溶性藻類萃取物。
