The utility model belongs to the development of coal -bed gas field, concretely relates to process simulation device is hidden in biological pneumatolytic in coal seam, the device becomes and the storage system including simulating the biological atmogenic of coal seam with fungus liquid interact, the pressure control and the monitoring system of analog control coal seam buried depth, the methanegas scale of construction that produces is surveyd in the simulation among the coal reservoir, gas composition and isotopc analysis, the circulation of fungus liquid and the biological gas detection of methane backeria determination of activity survey the system, realize that biological atmogenic becomes and store the thermostatic control's of system temperature regulating and controlling system,pressure control surveys the system with monitoring system, temperature regulating and controlling system, the circulation of fungus liquid and biological gas detection and becomes and store the headtotail, pressure control and monitoring system and the external host computer of temperature regulating and controlling system with biological atmogenic respectively. The device and experimental methodcan explore biological atmogenic and become the one -tenth process of hiding along with coal seam lifting and decline, pass through coal seam vary voltage, accuse temperature simultaneously, pour into fungus liquid into, and the law is deposited in the formation and the tax of simulation coal seam biology gas.