The purpose of this study is to reuse the methane fermentation treated water to the hydroponics. After the fermentation of the mixed slurry between a cattle waste and garbage, the mixed slurry was dewatered. The filtered water was used as the liquid fertilizer for the experiment of the hydroponics. It was understood to be able to use filtered water for the hydroponics by diluting it with the water of the fixed rate. The nutrient medium of filtered water showed the effect equal with a nutrient medium on the standard KASUGAI liquid. In addition, this nutrient medium was suggested that there be an effect of the evasion medicine on the noxious insect.