A use of Cds quantum dots of manufacturing drugs for treating infection of yeast is disclosed. The Cds quantum dots with diameter being 1~7 nm is produced by cadmium nitrate, sodium sulphide and 3-mercaptopropionic acid under pH 9.0, 96℃.本發明係提供一種硫化鎘量子點之用途,係用以製備治療酵母菌感染藥物,其中,該硫化鎘量子點係以硝酸鎘、硫化鈉及3-巰基丙酸,在pH 9.0、反應溫度96℃環境下生成,該硫化鎘量子點之粒徑為1~7 nm。