In view of the low efficiency of gasification at this stage，the technology of biomass gasification technology can solve it effectively． The method for process integration and combination can achieve higher process efficiencies，the quality and purity of gas will be better，and the investment costs will be lower ． The recently developed UNIQUE gasifier which integrates gasification，gas cleaning and conditioning in one reactor unit is an example for a promising process integration． Combine pyrolysis and gasification or gasification and combustion in single controlled stages． Poly-generation strategies for the production of multiple energy products offer high efficiency and flexibility．