The utility model discloses a novel ambient air quality monitor, which comprises an ambient air quality monitor body, and further comprises a solar power supply which is formed by a solar cell panel, a controller and a chargeable cell, wherein the solar power supply can provide working power supply for the ambient air quality monitor body, the solar cell panel is installed on the outer side face of the ambient air quality monitor body, and the controller and the chargeable cell are installed inside the ambient air quality monitor body, and the signal output end of the ambient air quality monitor body is connected with a wireless emitting circuit. Compared with the prior art, the ambient air quality monitor of the utility model omits the outdoor wire distribution, is environment-friendly and energy-saving, and can send out the output signals of the ambient air quality monitor body to an indoor monitoring center through the wireless emitting circuit, which is an ambient air quality monitor suitable for outdoor use.