An environment control apparatus includes an apparatus body, a processing device, and a plurality of temperature adjusting devices. The apparatus body includes a plurality of accommodating chambers each having one of the temperature adjusting devices. Each of the temperature adjusting devices has a heater and a cooler. When a chip testing device carrying a plurality of chips is arranged in one of the accommodating chambers, the chip testing device is supplied with electricity, and the heater and the cooler of the corresponding temperature adjusting device are controlled to operate, the chip testing device performs a testing process on the chips disposed thereon.