The invention relates to the technical field of cabinets, in particular relates to a constant temperature and humidity incubator. The constant temperature and humidity incubator is used for placing culture dishes and performing culture treatment, and comprises a box body, a box door, a heating unit, a humidifying apparatus, refrigerating equipment and a circuit board, wherein the box door is arranged at front side face of the box body, a temperature sensor and a humidity sensor are arranged on the inner side surface of the box body, a plurality of clapboards are arranged in the box body, and the culture dishes are placed on the clapboards; a wireless signal generator and a wireless signal receiver are arranged on the circuit board connected with a mobile device through wireless signal transmission; a culture dish storage disk comprises a rotary disk and a rotating motor, a rotary shaft is arranged at the output end of the rotating motor, the rotary disk is arranged on the rotary shaft, a cooling plate is arranged below the rotary disk, is fixed on the rotary shaft, and adheres to the lower surface of the rotary disk, and a plurality of culture dish placing slots distributed in a diverging manner are arranged on the surface of the rotary disk.