NOVELTY - A system for monitoring a multi-stage fermentation of the biomass in the reaction system comprises at least one physical parameter, and at least two raw to achieve central controller (4), or transmission of data or information to sensor and/or probe via digital/analog cable (20), the central controller or total server operate conditions of sensors and/or probes programmable to logic controller (PLC); and process parameters are used to maintain/adjust actuator and operate conditions of actuator, or data information transfer and total server/central controller via digital/analog cable.    USE - As monitoring system, particularly a multi-stage biomass fermentation reaction system for monitoring hydrogen/methane mixture, ethanol/methane, hydrogen/alcohol mixed microbial fuel cell or ethanol/microbial fuel cell automatic production (claimed).    ADVANTAGE - The system uses the configuration software, so as to control process to form parameter of image to the way of digital display intuitively, conveniently realize monitoring of the whole production system, and improves the working efficiency.    DETAILED DESCRIPTION - A system for monitoring a multi-stage fermentation of the biomass in the reaction system, comprises: at least one physical parameter for monitoring the fermentation reactor multi-stage fermentation of the biomass in the reaction system, and at least two raw to achieve central controller (4), or transmission of data or information to the sensor total server and/or probe via digital or analog cable (20) signal cables, the central controller or the total server comprises; operating conditions of the sensors and/or probes programmable logic controller (PLC), where at least one of the biomass reactor and at least one process parameter monitor results or operate conditions to maintain or adjust other biomass fermentation reactor, at least one process parameter and/or operating conditions; and process parameters used to maintain or adjust the actuator and/or operating conditions of the actuator, or data information transfer and the total server or central controller via a digital or analog cable signal cable.    DESCRIPTION OF DRAWING(S) - The figure shows a view of a system for monitoring the fermentation of biomass.    Hydrogen production reactor (2)    Central controller (4)    Alkali storage tank (7)    Acid storage tank (8)    Feeding pump (13, 14)