This research analyzed the fuel characteristic change of spent coffee bean by torrefaction. The calorific value was increased from 4,974 kcal/kg to 6,075 kcal/kg ($260^{circ}C$, 30min), 6,452 kcal/kg ($270^{circ}C$, 30min), 6,823 kcal/kg ($280^{circ}C$, 30min), 6,970 kcal/kg ($260^{circ}C$, 30min). The highest energy yield was obtained when the spent coffee bean were torrefied on the condition of $280^{circ}C$, 30min. The moisture absorption rate was decreased from 5.12% to 2.76% when the spent coffee bean were torrefied on the condition of $290^{circ}C$, 30min. Lignin was increased from 11.33% to 14.39% on the condition of $260^{circ}C$ 30min. But it did not preferability to torrefy spent coffee bean at temperature of more than $270^{circ}C$ because lignin decreases to the level that is hard to make pellet.