MAR-2 is a fire extinguishing device for the space station. The device as a whole can quickly curb the spread of unexpected fires in the space station by filtering oxygen in the air and reducing the density of gas in the air. In the space environment, due to the low gravity, it is difficult for users to control traditional fire extinguishing devices. At the same time, the low gravity environment will greatly reduce the fire extinguishing effect of traditional physical fire extinguishing devices.