The invention relates to a mini-environmental control cabinet for animal breeding and plant cultivation. Primarily, the environmental control cabinet is provided with a plant cultivation area and an animal breeding area, wherein a spacer layer is used to divide the plant cultivation area from the animal breeding area. A plant growth lamp is equipped in the plant cultivation area while a warm lighting is installed in the animal breeding area. Both areas are equipped with cooling chips, and cooling fans is provided outside the cooling chips. Furthermore, a humidifier is disposed within the plant cultivation area. Additionally, the environmental control cabinet is provided with fuel cells, and power source of the fuel cells can be output and shut down by means of controlling the switch of the fuel cells, such that the required power for the whole environmental control box can be supplied by the fuel cells. Accordingly, the consumption of electric energy can be reduced in usage, and there is no noise and pollution caused when the cooling chips are used for lowering the temperature. Thus the temperature and the moisture can be controlled accurately, so as to increase the practicability and efficiency for the whole implementation.