The invention relates to environment 
simulation laboratory equipment, especially to a multifunctional environment 
simulation cabin comprising a cabin body, a PLC 
control system installed at the outer wall of the cabin body, an air circulation and purification sub 
system for air circulation and purification inside the cabin body, a new air conveying sub 
system for inputting new air into the cabin body, a target 
gas concentration control sub 
system, and a pressure-control exhaust system. The PLC 
control system is connected with and controls a plurality of function sub systems by signals, thereby realizing 
simulation of the environment with different temperatures and 
humidity and target gas concentrations inside the cabin. According to the invention, an external circulating air hose is provided with different purification device interfaces to installed tested purification devices, so that 
dynamic testing of tested purifiers on the circulating air hose as well as testing of static environments with different monitoring gas concentrations can be simulated. Testing demands of various purifying devices like an adsorption type purifying device, a 
photocatalysis type purifying device, or a 
plasma-technology-based purifying device can be satisfied.