NOVELTY - The method comprises transforming biomass with water and catalyst in a pressure container by temperature- and pressure increase in materials such as coal or oil. The pressure container is formed as pipeline with a controllable inlet opening and a controllable outlet opening, where the biomass, water and catalyst are brought to the container over the controllable inlet opening. The temperature- and/or pressure ratio in the pressure container are controlled in such a way that the filling goods of biomass, water and catalyst brought to the pressure container are transported in the pipeline.    USE - Method useful for hydrothermal carbonization of biomass.    ADVANTAGE - The method ensures simple and efficient hydrothermal carbonization of biomass with good quality.    DETAILED DESCRIPTION - The method comprises transforming biomass with water and catalyst in a pressure container by temperature- and pressure increase in materials such as coal or oil. The pressure container is formed as pipeline with a controllable inlet opening and a controllable outlet opening, where the biomass, water and catalyst are brought to the pressure container over the controllable inlet opening. The temperature- and/or pressure ratio in the pressure container are controlled in such a way that the filling goods of biomass, water and catalyst brought to the pressure container are transported in the pipeline. The biomass, water and catalyst react to each other and are obtained over the controllable outlet opening as reaction product of the filling goods. The filling goods and/or reaction product of the filling goods present in the pressure container are transported and/or mixed by a conveyor screw arranged in the pipeline of the pressure container, with two controllable screw spirals, which are separately controllable for mixing and/or transporting the filling goods and/or reaction products of the filling goods present in the pressure container. The screw spirals of the conveyor screw are operatable against each other or are continuously or discontinuously operatable. The temperature and/or pressure ratio in the pressure container are controlled in such a way that the filling goods are transported in the pipeline. The supply of biomass, water and/or catalyst takes place over a locking chamber having the controllable inlet opening and the controllable outlet opening arranged before the inlet opening of the pressure container. The locking chamber is connected with a supply storage of biomass, water and/or catalyst at the side of the controllable inlet opening and is connected with the controllable inlet opening of the pressure container. The transporting of biomass, water and/or catalyst takes place from the locking chamber in the pressure container through pressurization. The supply of biomass, water and/or catalyst takes place over a piston-pressing device arranged before the controllable inlet opening of the pressure container. The piston-pressing device has a chamber with an inlet opening, a controllable outlet opening and a piston movable in the chamber for pressing of goods present in the chamber. The transporting of biomass, water and/or the catalyst takes place from the chamber in the pressure container through pressurization applied by the piston. The supply of biomass, water and/or catalyst takes place over an excenter screw pump arranged before the controllable inlet openings, with pressure control. The temperature- and/or pressure ratio is controlled in the pressure container over the controllable device. The temperature- and/or pressure ratio is controlled in the pressure container over the control device. The pressure container is heated and/or cooled. The pipe line of the pressure container is partially arranged in a container filled with heat exchanging and the heating and/or the cooling of the pressure container is controlled over the temperature of the heat exchanging medium in the container. Potato starch- and/or cereal starch is used for the filling goods of biomass, water and catalyst. The withdrawal of the reaction product of the filling goods is carried out over a filter arranged towards the outlet opening of the pressure container. The reaction product of the filling goods is pressed before and/or after the withdrawal. The supply of biomass, water and/or catalyst, the adjustment of temperature- and/or pressure ratio in the pressure container, the transport of the filling goods through the pressure container and/or the withdrawal of the reaction product of the filling goods from the pressure container are carried out by control device. The temperature is constantly held in pressure container over the temporal duration of the transport of the filling goods through the pressure container. The temperature in the pressure container is held over the temporal duration of the transport of the filling goods through the pressure container at 180.00-200.00 degrees C. An INDEPENDENT CLAIM is included for a device for hydrothermal carbonization of biomass.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic representation of a device for hydrothermal carbonization of biomass (Drawing includes non-English language text).