The invention provides a temperature control and dehumidification control method which comprises the following steps of S1, starting a temperature control and dehumidification mode; S2, running for afirst preset time t1 at a refrigeration mode; S3, detecting the current indoor environment temperature Tir, entering a step S4 when the Tir is equal to or smaller than a preset temperature threshold,and entering a step S5 if the Tir is larger than the preset temperature threshold; and S4, detecting the current indoor environment temperature Tir and the relative humidity phi ir, calculating the current moisture content Dir, entering a step 6 when the moisture content Dir is smaller than or equal to a preset moisture content threshold, and entering a step 7 when the Dir is larger than the preset moisture content threshold. The moisture content in air is used for replacing the relative humidity so as to be used as a judgement standard of a dehumidification effect, so that the comfort level of a user can be improved in the use process, and meanwhile, the accuracy and the conciseness in control are realized.