1. An application system comprising a solid state semiconductor storage device with temperature control function, wherein the solid state semiconductor storage device comprises: a non-volatile memory unit storing digital information; a temperature sensing element sensing an operation temperature of the solid state semiconductor storage device and producing a corresponding temperature sensing signal; and a control unit electrically connected to the temperature sensing element and the non-volatile memory unit, said control unit receiving said corresponding temperature sensing signal from the temperature sensing element, comparing said corresponding temperature sensing signal with at least one predetermined temperature threshold, and executing a corresponding procedure according to a result of the comparison, wherein said control unit executes said corresponding procedure by adjusting a speed of executing commands issued by the application system.