Dehumidification control method and dehumidification system

The invention discloses a dehumidification control method and a dehumidification system.The dehumidification system comprises a compressor, a condenser, an expansion valve, an evaporator, a reheater and a controller, and the dehumidification control method comprises the steps that a first humidity state parameter capable of representing the environment humidity and a first temperature state parameter capable of representing the environment temperature are obtained; when the first humidity state parameter is not lower than a dehumidification starting threshold value, a dehumidification mode is started; and in the dehumidification mode, when the first temperature state parameter is smaller than a thermal compensation starting threshold value, the dehumidification heat compensation mode is started. Only after the dehumidification mode is entered, the first temperature state parameter is compared with the thermal compensation starting threshold value to judge whether the dehumidification mode needs to be entered