A volatilization device, comprising: a housing , having a cavity, wherein the housing is provided with an air outlet communicated with the cavity; and a color-changing member , fixed to the housing , wherein a side of the color-changing member is exposed to the cavity, another side of the color-changing member is visible from an outer wall of the housing , and the color-changing member changes color according to a concentration of a target gas in the cavity characterized in that the volatilization device further comprises: a first annular rib , provided in the cavity to divide the cavity into an accommodation cavity and an annular cavity distributed inside and outside, wherein the accommodation cavity is provided on an inner side of the annular cavity, wherein the first annular rib is provided with a first vent hole communicating the accommodation cavity with the annular cavity, and the first vent hole is provided separately with the air outlet ; and a partition plate , provided in the annular cavity to divide the annular cavity into two buffer cavities distributed in front and back, wherein the partition plate is provided with a second vent hole communicating the two buffer cavities; and the accommodation cavity is communicated with one of the two buffer cavities through the first vent hole, and another of the two buffer cavities is communicated with the air outlet . a housing , having a cavity, wherein the housing is provided with an air outlet communicated with the cavity; and a color-changing member , fixed to the housing , wherein a side of the color-changing member is exposed to the cavity, another side of the color-changing member is visible from an outer wall of the housing , and the color-changing member changes color according to a concentration of a target gas in the cavity characterized in that the volatilization device further comprises: a first annular rib , provided in the cavity to divide the cavity into an accommodation cavity and an annular cavity distributed inside and outside, wherein the accommodation cavity is provided on an inner side of the annular cavity, wherein the first annular rib is provided with a first vent hole communicating the accommodation cavity with the annular cavity, and the first vent hole is provided separately with the air outlet ; and a partition plate , provided in the annular cavity to divide the annular cavity into two buffer cavities distributed in front and back, wherein the partition plate is provided with a second vent hole communicating the two buffer cavities; and the accommodation cavity is communicated with one of the two buffer cavities through the first vent hole, and another of the two buffer cavities is communicated with the air outlet . a first annular rib , provided in the cavity to divide the cavity into an accommodation cavity and an annular cavity distributed inside and outside, wherein the accommodation cavity is provided on an inner side of the annular cavity, wherein the first annular rib is provided with a first vent hole communicating the accommodation cavity with the annular cavity, and the first vent hole is provided separately with the air outlet ; and a partition plate , provided in the annular cavity to divide the annular cavity into two buffer cavities distributed in front and back, wherein the partition plate is provided with a second vent hole communicating the two buffer cavities; and the accommodation cavity is communicated with one of the two buffer cavities through the first vent hole, and another of the two buffer cavities is communicated with the air outlet . <EOS>