system 10 through the dc power output interface 122 after a port of the electric appliance 32 is connected to the dc power output interface 122 the power supply system 10 will start outputting electric power to the electric appliance 32 for the operation of the electric appliance 32 in addition to the concept of a power bank the portable solar power supply system of the invention can be installed directly in an information processing device 31 with reference to fig6 for a schematic view of a portable solar power supply system in accordance with a second preferred embodiment of the present invention the solar panel 20 is installed on a surface of the information processing device 31 for receiving a solar light source and the power supply system 10 installed in the information processing device 31 similarly supplies a direct current power dc or a working power source and the remaining direct current power dc is stored into the power supply system 10 now the rechargeable battery of the information processing device 31 is replaced by the power supply system 10 and the power supply system 10 supplies a working power source for a functional mechanism 311 to achieve a normal operation and function.