The present invention relates to a malodor removal system which, more particularly, comprises: a body which is in the shape of a closed box having a vertical length and includes a malodor inlet, formed on one side of a lower portion, an air outlet formed on an upper end portion, and a cleaning solution collection tank for collecting a cleaning solution which is formed under the malodor inlet, is closed by a cleaning solution guiding plate, which is inclined downward from an outward portion toward the center and includes a cleaning solution recollection hole, closed by a filter, on the center a liquid fertilizer circulation unit which is formed on the outside of the body, recollects and purifies a used cleaning solution, and re-supplies the cleaning solution a spraying treatment unit which is formed above the cleaning solution collection tank in the body, guides malodor inserted through the malodor inlet, and perform a spraying treatment on malodor substances included in the malodor by spraying a liquid fertilizer containing microorganisms a biological treatment unit which is formed to be extended from the inside of the body toward an upper portion of the spraying treatment unit, horizontally closes the body from the upside of the spraying treatment unit, is formed to allow wood chips on which microorganisms are deposited to be filled in a mesh body, and thus decompose and removes the malodor substances included in the malodor and an oxidation treatment unit which is formed above the biological treatment unit in the body, comprises a device for spraying ozone or chlorine dioxide gas generated by an ozone generator or a chlorine dioxide gas generator, and thus removes the remaining malodor substance by using the sprayed ozone or chlorine dioxide gas. The present invention relates to a complex-type malodor removal system which can effectively remove malodor through treatment processes proper for substances included in the malodor by sequentially performing a spraying t
