The invention relates to the technical field of experimental devices, in particular to an experimental device for simulating a haze environment and a data monitoring system thereof. The experimental device comprises a haze simulating experiment box, a haze generating system, and the data monitoring system and further comprises a wind speed control system, a temperature control system, a haze particle size testing system and an exhaust system. The haze simulating experiment box is connected with a haze generating system, the data monitoring system, the wind speed generating system, the temperature control system, the haze particle size testing system and the exhaust system. Due to the fact that the exhaust system is arranged at the bottom of the experiment box, after an experiment is finished, haze ingredients in the experiment box can be discharged through the exhaust system to prevent haze particles from harming the health of experimenters, work can be conducted smoothly, and safety of the work of the experimenters is guaranteed.