The alcohol production system 10 / b A according to the present invention includes a sugar liquid production apparatus 11 / b A, an alcohol fermentation tank 12, a distillation tower 13, and an alcohol tank 14. The sugar liquid production apparatus 11A includes a separation device 15 that separates an edible raw material 21 having a carbohydrate-based raw material into a non-edible raw material 22 having a cellulosic biomass raw material containing a lignin component and a hemicellulose component, and an edible raw material 21-derived A sugar solution adjustment unit 16A that generates a sugar solution 23 and a non-edible material saccharification unit that produces a diluted sugar solution 30 by saccharification of a biomass hydrothermal treatment product obtained by decomposing the non-edible material 22 with a separator 15 17A and a diluted sugar solution supply pipe L21 for supplying the diluted sugar solution 30 obtained in the non-edible raw material saccharification unit 17A to the sugar solution adjusting unit 16A. Thereby, the production efficiency of the sugar solution 23 can be improved and the cost can be reduced.
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