NOVELTY - Converting biomass with water to gaseous products involves filling reactor containing packing having filler body with molten salt; heating molten salt such that the salt spreads out inside reactor; feeding watery biomass into reactor, where biomass is heated up to reaction temperature, thus resulting in conversion of biomass to gaseous products; removing portions of molten salt enriched with additional salts from biomass from and replacing of removed portion with fresh salt solution; removing gaseous products from reactor via discharge pipe.    USE - For converting biomass to gaseous products (claimed).    ADVANTAGE - The method involves thermolytic decomposition of the biomass and the forming of additional salts from the biomass take place only inside the reactor, thus additional salts can be bound directly at the location where they are formed. The method is continuous method.    DETAILED DESCRIPTION - Converting biomass with a water content of at least 50% to gaseous products involves filling a reactor containing a packing having at least one filler body with a molten salt comprised of one of a salt or salt mixture having a melting point below a reaction temperature required for converting the biomass to gaseous products; heating the molten salt so that the molten salt spreads out inside the reactor over the packing with the at least one filler body; feeding a watery biomass into the reactor, where the biomass is then heated up to the reaction temperature and comes in contact with the molten salt on the packing with the at least one filler body, thus resulting in the conversion of the biomass to gaseous products and causing additional salts from the biomass to be bonded to the molten salt; removing portions of the molten salt enriched with additional salts from the biomass from the reactor and replacing of the removed portion of molten salt with a fresh salt solution; removing the gaseous products from the reactor via a discharge pipe; and implement the process steps above the critical water pressure. An INDEPENDENT CLAIM is included for a device for converting biomass with water content of at least 50% to gaseous products comprises reactor filled at least partially with packing including at least one filler body for accommodating supercritical water and hydrothermal molten salt; heater arranged to heat up the reactor and its content; first feeding pipe coupled to reactor to feed water and salt solution into reactor; second feeding pipe coupled to reactor to feed to biomass into reactor; discharge pipe to discharge gaseous products from reactor; and outlet in bottom of the reactor for removing portions of the molten salt.