The automatic distribution station is to connect the inlet and suction pipes between a number of libraries to the distribution station, and then the distribution station is connected with ￠110PVC pipes and ￠8 high-pressure pipes and air conditioning equipment and automatic analyzer. The distribution station has manual valves and butterfly valves imported from Italy. When the analyzer detects that the gas content in the library is higher than the set value, the automatic distribution station is instructed to automatically open the automatic butterfly valve between the corresponding library, and then the device automatically starts to start the removal procedure. After the program is completed, the equipment automatically stops and the automatic valve on the distribution station automatically closes.