NOVELTY - The system has an evaporation module (10) that is supplied with organic substance i.e. biomasses, to be dried. A supplying pipe (15) supplies the substance from the evaporation module to a pyrolysis reactor (20) and a gassing device (30) to produce pyrolysis fuel syngas (Sp) and gasification fuel syngas (SG), respectively. A first channel supplies the pyrolysis and gasification fuel syngases to an energy user (40). A second channel supplies burnt exhaust gases (GC-M) produced by the energy user towards the evaporation module.    USE - System for pyrolyzation and gasification of organic substances e.g. biomasses such as thermo-valorizing biomasses, for use as fuel for an explosion engine or a fuel cell to produce electricity. Can also be used for pyrolyzation and gasification of wastes such as agricultural and agroindustrial residuals, agricultural and forest virgin biomasses, forest and forest-cultivating residuals, and wood and paper working residuals.    ADVANTAGE - The system enables destroying the organic substances completely by dividing molecules such as long carbon chains, of the substances into simpler molecules of carbon monoxide, hydrogen and natural gas, thus reducing environmental impact both as regards production and transport of produced syngas while allowing reuse of the resulting heat. The system allows a synergic operation between the pyrolyzation reactor and the gassing device in a single integrated system, thus optimizing the operation of the system through suitable thermal and energy cooperation.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a process for pyrolyzation and gasification of organic substances.    DESCRIPTION OF DRAWING(S) - The drawing shows a side sectional view of an organic substances pyrolyzation and gasification system.    Burnt exhaust gases (GC-M)    Gasification fuel syngas (SG)    Pyrolysis fuel syngas (Sp)    Evaporation module (10)    Supplying pipe (15)    Pyrolysis reactor (20)    Gassing device (30)    Energy user (40)