Fuente: WIPO "circular economy" The utility model discloses a device for monitoring the concentration of PM2.5 in air. The device comprises a device base, an anemograph and a PM2.5 monitor, an anemograph and a PM2.5 monitor are fixedly installed on the upper surface of the device base, a fixing ring is fixedly connected to the back face of the device base and connected to the periphery of the telegraph pole in a sleeving mode, and a walking mechanism for driving the fixing ring to spirally ascend along the outer wall of the telegraph pole is arranged on the inner edge, opposite to the outer wall of the telegraph pole, of thefixing ring. When the monitoring device is used, in the process that the whole monitoring device spirally rises along the periphery of a telegraph pole, the PM2.5 monitor monitors the PM. Concentration in air at different height layers, and meanwhile the anemograph monitors the wind speed.