This literature review aims to determine the potential of various carbohydrate sources as raw materials for bioethanol production through fermentation to achieve maximum ethanol concentration. The hydrolysis process is conducted enzymatically using microbes during the liquefaction stage and gluco-amylase during the saccharification stage, followed by fermentation by microbes. The literature results show that the carbohydrate source, Ganyong tuber (Canna edulis Kerr.), produces a maximum ethanol concentration of 84.451% with a fermentation period of 7 days. Keywords: Bioethanol, Fermentation, Hydrolysis, Carbohydrate