The invention discloses a formaldehyde remover. The formaldehyde remover comprises an information detection device, a heating and humidity control device, a formaldehyde removal device and a controller, wherein the information detection device is used for detecting the temperature, the humidity and the formaldehyde concentration of the indoor environment, the controller is used for starting up the heating and humidity control device when the detected temperature value is lower than a preset temperature threshold and/or the detected humidity value is lower than a preset humidity threshold, and starting up the formaldehyde removal device when the detected temperature value is not lower than the preset temperature threshold, the detected humidity value is not lower than the preset humidity threshold, and the detected formaldehyde concentration value is not lower than the preset formaldehyde concentration threshold, and when the detected formaldehyde concentration value is lower than the preset formaldehyde concentration threshold, the formaldehyde removal device is shut down by the controller. With the formaldehyde remover, firstly, formaldehyde volatilization is accelerated by increasing the temperature and humidity of the environment, the formaldehyde in the neglected corners of a house and the formaldehyde hidden in the inner layers of furniture and other positions volatilize as soon as possible so that the efficiency of treatment can be improved, the volatilization time of formaldehyde is shortened, the effect of removing formaldehyde is enhanced, the amount of residual formaldehyde is reduced, and therefore, the purpose of protecting the health of people is achieved.