This microcomputer humidity controller has a wide range of modern humidification and dehumidification technology; Small size, easy to operate, the ability of accurate measurement and anti-interference, etc. Humidity sensor uses a high-precision capacitive faster chip which has the advantage of high accuracy to reflect. Automatic intelligent control system suits most users in different environment for kinds of humidification and dehumidification equipment. humidification and dehumidification mode could be set in the menu.