Sniffer4D V2 is an ultra-fine grid atmospheric mobile monitoring device that can be installed on a mobile device through a matching mounting component to capture the high spatial resolution distribution of gases and particles and transmit the data back to the analysis software in real time. In the previous air monitoring equipment, it is necessary to install multiple equipment in the monitoring section to achieve the monitoring effect. Lingling Smell V2 can cover a larger monitoring range by carrying unmanned aerial vehicles, and can replace humans to monitor harsh environments such as fires and chemical explosions by loading on unmanned aerial vehicle equipment. It can quickly locate the air pollution source and analyze the content composition of the air through the grid distribution map generated in real time.