Abstract: This work investigated effect of flocculent precipitate in liquor on medium characteristics by using ethyl palmitate as inducer. The conductivity and fluorescence intensity of solution pre- or post- precipitating were respectively detected at different alcohol concentrations and temperatures. The results reveal that the solution conductivity after precipitating was maximal,then that of pre- precipitated solution,the conductivity of the control was lowest. Meanwhile,the fluorescence intensity of the control solution was more than that of the precipitated solution,and it was the lowest for the pre- precipitated solution. This work indicated that the formation of organic flocculent which had obvious effect on liquor characteristics was influenced by temperature and alcohol concentration.