A kind of solar energy with storage tank by stirling engine to couple electric charging system , including solar collector、stirling engine and electric charging device. Solar energy collector have two functions, one is heating, another is energy storage. Stirling engine can operate by heat from energy storage. The electric charging system is coupled with stirling system. Using heat of solar energy, stirling engine can operate and make electric charging system work. Moreover, the heat will be released from energy storage at night and stirling engine still works all the day to supply electric power.