NOVELTY - A system for pyrolyzing upgrading coal and biomass at middle low temperature comprises fixing bed, vibrating bed or shifting bed type middle and low temperature pyrolyzing furnace, raw coal inlet, steam inlet, mixture outlet of upgrading coal and waste catalyzing heat carrier and oxygen transferring material, pyrolyzing gas output pipeline, and at least one middle low temperature pyrolyzing area between raw coal inlet and upgrading coal outlet in middle low temperature pyrolyzing furnace.    USE - System for pyrolyzing upgrading coal and biomass at middle low temperature (claimed).    ADVANTAGE - The system recycles regenerated catalyzing heat carrier and oxygen transferring material.    DETAILED DESCRIPTION - System for pyrolyzing upgrading coal and biomass at middle low temperature comprises fixing bed, vibrating bed or shifting bed type middle and low temperature pyrolyzing furnace, raw coal inlet, steam inlet, mixture outlet of upgrading coal and waste catalyzing heat carrier and oxygen transferring material, pyrolyzing gas output pipeline, and at least one middle low temperature pyrolyzing area between raw coal inlet and upgrading coal outlet in middle low temperature pyrolyzing furnace. The raw coal is reacted with catalyzing heat carrier and oxygen transferring material for supplying oxygen to pyrolyze at middle low temperature in pyrolyzing area and generate pyrolyzing gas, tar or synthetic gas, including methane, carbon monoxide, carbon dioxide, hydrogen and steam. The system further comprises at least one catalyzing heat carrier and oxygen transferring material regenerator connected with pyrolyzing furnace via solid-solid separating device, waste catalyzing heat carrier and oxygen transferring material conveying pipe and regenerating catalyzing heat carrier and oxygen transferring material conveying pipeline. The waste catalyzing heat carrier and oxygen transferring material in catalyzing heat carrier and oxygen transferring material regenerator is oxidized to the gas with oxygen in regenerator to regenerate. The regenerated crystallizing heat carrier and oxygen transferring material is returned into pyrolyzing furnace via regenerating catalyzing heat carrier and oxygen transferring material conveying pipe. The gas with oxygen with oxygen reduced in oxidizing reaction or without oxygen is exhausted via outlet. The mixture of upgrading coal out of pyrolyzing furnace and waste catalyzing heat carrier and oxygen transferring material are separated via solid-solid separating device via diameter difference and/or gravity difference. The separated waste catalyzing heat carrier and oxygen transferring material is transformed into catalyzing heat carrier and oxygen transferring material regenerator to regenerate via waste catalyzing heat carrier and oxygen transferring material conveying pipeline. The condenser is connected with pyrolyzing furnace via the pyrolyzing gas output pipeline. The tar gas or synthetic oil gas is condensed into tar or liquefaction synthetic oil that is separated from the pyrolyzing gas. An INDEPENDENT CLAIM is included for producing upgrading coal, high heat value pyrolyzing gas and tar or liquefaction synthetic oil via the system for pyrolyzing upgrading coal and biomass at middle low temperature.    DESCRIPTION OF DRAWING(S) - The drawing is a schematic diagram illustrating a system for pyrolyzing upgrading coal and biomass at middle low temperature. (Drawing includes non-English language texts).