NOVELTY - Synergy device of solar thermal generating system to improve methane tank production efficiency comprises: parabolic mirror (1), heat exchanger (2), turbonator (3), water pipe (4), heat exchange support rod (5), mirror support frame (6), conductor wire (7), diverter (8), warming device (9), motor (10), mixer (11), and methane tank (12); where heat exchange support rod has heat exchange device and turbonator, water pipe and heat exchanger are connected; turbonator is connected with diverter connected to warming device and motor for mixer, and warming device and mixer are in methane tank.    USE - As synergy device of solar thermal generating system to improve production efficiency of methane tank (claimed).    ADVANTAGE - In the device, sunshine irradiates parabolic mirror surface, mirror surface collects sunlight for heating liquid water by heat exchanger to heat liquid water into steam, steam is utilized to drive turbonator to produce current, current is divided into two parts after inputting into diverter by wire, where one part of current is input to warming device inside methane tank, thus switches electric energy into heat energy and properly increases temperature of fermentation liquid to quickly propagate methane bacteria and produce more methane; and the other part of current is input to motor by wire to switch electric energy into mechanical energy, where motor drives mixer in methane tank to mix fermentation solution and improves production efficiency of methane. The device thus fully uses solar photo-thermal power generation power generated on one hand, by device in fermentation liquor for properly increasing temperature of fermentation liquid, suitable for marsh gas bacteria to decompose organic matter and produce more marsh gas; and on other hand drives motor and stirrer to provide more uniform mixing of liquid to produce more methane. Thus device is synergistic device having combination of solar thermal power generation system and solar photovoltaic power generating system for use in marsh gas pool, and provides optimal economic benefit. The solar energy thermal generating system does not use expensive solar energy battery, thus power generation cost can be reduced, but at the same time steam turbine generator generates electricity on large scale. The device is suitable for both marsh gas tank that having large-scale glass steel hydraulic biomass pool of 1000 m2 or small biogas tank.    DETAILED DESCRIPTION - A synergy device of solar thermal generating system for improving production efficiency of methane tank, comprises: parabolic mirror surface (1), heat exchange device (2), turbonator (3), water supply pipe (4), heat exchange support rod (5), support frame (6) of parabolic mirror surface, conductor wire (7), diverter (8), warming device (9), motor (10), mixer (11), and methane tank (12); where support frame of parabolic mirror surface is provided with parabolic mirror surface, heat exchange support rod is provided with heat exchange device and turbonator, water supply pipe and heat exchange device are connected and communicated; turbonator is connected with diverter by conductor wire, diverter is connected with warming device by conductor wire and is connected with motor by conductor wire and mixer is arranged below motor; and warming device and mixer are arranged inside methane tank. The turbonator is backpressure type turbonator, extraction condensing type turbonator, or condensing type turbonator.    DESCRIPTION OF DRAWING(S) - The figure shows structure of the synergy device of solar thermal generating system.    Parabolic mirror surface (1)    Heat exchange device (2)    Turbonator (3)    Water supply pipe (4)    Heat exchange support rod (5)    Support frame of parabolic mirror surface (6)    Conductor wire (7)    Diverter (8)    Warming device (9)    Motor (10)    Mixer (11)    Methane tank (12)