NOVELTY - A biomass raw material gas making device comprises a burning gas generating device, dedusting cooling purifying device, and storing dry device, where the three devices are connected with each other via a gas pipeline with valve.    USE - The biomass raw material gas making device is useful for generating pure gas and charcoal.    ADVANTAGE - The biomass raw material gas making device has high security and low cost; it can fully use various biomass raw materials to generate pure gas, at the same time, it can generate charcoal.    DETAILED DESCRIPTION - A biomass raw material gas making device comprises a burning gas generating device, dedusting cooling purifying device, and storing dry device, the three devices are connected with each other via a gas pipeline with valve, where an ignite sampling gas pipeline and an air discharge pipeline are led out in front of the valve of the gas pipeline which communicate the burning gas generating device and dedusting cooling purifying device, the ignite sampling gas pipeline and an air discharge pipeline are equipped with valves; the burning gas generating device includes gas making furnace, pressure air source, an annular water jacket is set outside of the gas making furnace, the water jacket is connected with water supply pump in the dedusting cooling purifying device via a water pipeline, the upper part of the water jacket is provided with gas outlet; the upper part of the gas making furnace is provided with a feeding mechanism and outlet pipeline, the outlet pipeline is connected to the dust collector cyclone in the dust collector cyclone; the lower part of the gas making furnace is provided with a furnace grate, and the lower part of the furnace grate is provided with a dust outlet mechanism and air supply pipeline, the air supply pipeline is connected to the pressure air source; the dedusting cooling purifying device includes dust collector cyclone, cooler, water purifier and water receiver, the upper part of the dust collector cyclone is connected to the burning gas generating device through gas pipeline, the lower part of the dust collector cyclone is connected with cooler through gas pipeline, the pipeline gets through the cooler and then inserts into the water in the water purifier, the cooler is divided into upper and lower parts, the upper part is water tank and the lower part is collecting chamber, a inducting pipe set in the cooler is connected to the collecting chamber, the upper part of the water purifier is provided with a gas outlet pipeline and connected to the storing dry device; the water receiver communicates with cooler and water purifier via water pipeline, and a water feeding pump and valve are mounted on the water pipeline, a water circulation structure is formed between the cooler and water receiver; the storing dry device includes air storage tank, dryer which are all sealed, one end of the air storage tank communicates with gas outlet pipeline of the water purifier via gas pipeline, the other end communicates with dryer via gas pipeline, the gas outlet pipe of the dryer communicates with air supply valve; the upper part of the dryer is provided with a charging port, and its lower part is provided with a discharging port and a drain valve, the lower part of the dryer is provided with a screen net with shading drain valve, and the upper part of the screen net is provided with a dry material. An INDEPENDENT CLAIM is a biomass raw material gas making method comprising: (a) processing biomass raw material, cutting biomass raw material into segments or crashing or making into artificial wood rod; (b) gasifying biomass raw material, putting basket with wood rod or crashed biomass raw material in gasification furnace where slow burning layer is installed, closing feeding mechanism and ash discharging mechanism after filling biomass raw material; blasting air in gasification furnace; (c) cooling and purifying fuel gas, introducing combustible gas produced in gasification furnace in dust catcher to do dust abatement process; introducing dedusting combustible gas in water cooler to cool and separate wood tar and pyroligneous; 3, introducing cooled combustible gas in water purification device to do purification process, water of water purification device is changed termly; and (d) storing and drying fuel gas, compressing purified water in air storage tank; and removing water of combustible gas of air storage tank through drying device, then supplying user.    DESCRIPTION OF DRAWING(S) - The drawing shows a front view of the device.