Abstract: A disinfection robot system, includes: a light disinfection unit having first UVC lamps exposed to the outside to perform disinfection through emission of ultraviolet light; a plurality of air suction and disinfection units each having a second UVC lamp, an air suction pipe adapted to locate the second UVC lamp therein and configured to prevent the ultraviolet light emitted from the second UVC lamp from being exposed to the outside, a plurality of photocatalyst-coated means disposed inside the air suction pipe to produce hydroxyl groups through the ultraviolet light emitted from the second UVC lamp, and a fan for sucking air to the interior of the air suction pipe; a sensing unit having a human presence sensor and a distance sensor; and a control unit for controlling the light disinfection unit and the air suction and disinfection units according to the information detected by the sensing unit.