providing a device for treating organic sulfur-containing wastewater, the device for treating organic sulfur-containing wastewater comprising a device body with a reaction chamber, an energy supply unit set outside the device body, and a treatment unit;

adding organic sulfur-containing wastewater with an initial concentration of organic sulfur into the reaction chamber through an inlet of the device body, wherein the initial concentration ranges between 10⁻⁵ mg/L and 10000 mg/L;

purifying the organic sulfur-containing wastewater through the treatment unit to ensure that organic sulfur content in the treated organic sulfur-containing wastewater is within a preset range;

wherein: purifying the organic sulfur-containing wastewater through the treatment unit comprises: when the initial concentration ranges between 10⁻⁵ mg/L and 1 mg/L, only using ultraviolet generator in the treatment unit to purify the organic sulfur-containing wastewater; when the initial concentration ranges between 1 mg/L and 100 mg/L, using a combination of ultraviolet generator and ozone generator in the treatment unit to purify the organic sulfur-containing wastewater; when the initial concentration ranges between 100 mg/L and 10000 mg/L, adding catalyst to the organic sulfur-containing wastewater, and using a combination of UV generator and ozone generator in the treatment unit to purify the organic sulfur-containing wastewater.