Temperature and humidity control device and control method

The invention provides a temperature and humidity control device and a control method. A temperature and humidity control device comprises a box body used for loading working equipment, a plurality of temperature and humidity collecting devices, a mode judging device, a mode switching device and a plurality of temperature and humidity adjusting devices, and the temperature and humidity collecting devices, the mode judging device, the mode switching device and the temperature and humidity adjusting devices are all installed in the box body. The temperature and humidity acquisition devices are located at the inner corners of the box body in a one-to-one correspondence mode, the mode judgment device and the mode switching device are located on the inner wall of the top end of the box body, the temperature and humidity adjusting devices are located at the corners of the two sides of the bottom of the box body, and one ends of the temperature and humidity adjusting devices penetrate through the box body and are lo