The invention discloses an energy saving and emission reduction intelligent furnace to combust briquetted straw stalks, combustible briquetted garbage, firewood waste, combustible waste, clean coal, coal and the like. During combustion, the ash temperature is lowered, and slagging is not prone to happening. Timely ash removing is conducted through an intelligent combined ash falling fire grate, air is not prone to being blocked by ash, and a normal combustion effect is achieved. A large-size furnace can adopt a walking type fire grate to discharge ash, and a small-size furnace can adopt a manual fire grate to remove ash. Combustible materials are fully combusted in sequence, flames grill a large-area transverse flat plate heat absorption water jacket, through long-distance water jacket heat absorption, the heat of an exhaust outlet is very small, the heat efficiency is high, and temperature increasing is rapid. According to the energy saving and emission reduction intelligent furnace, an intelligent axial-flow induced draft fan without a shell is arranged, and the shell of the draft fan is omitted, so that raw materials are saved, electricity is saved, the air volume is large, and the noise is low; the intelligent axial-flow induced draft fan can be automatically opened according to the temperature needed in a room, so that the temperature is increased, and the intelligent axial-flow induced draft fan can be automatically stopped according to the temperature needed in the room, so that the temperature is lowered; and the energy saving and emission reduction intelligent furnace is controllable in temperature, high in heat efficiency and rapid in temperature increasing, smoke is not prone to being emitted, and tar is not prone to coming out.