Shared power source system and payable charging method

The invention discloses a shared power source system which comprises a shared power source side, a server side used for expense and permission management, and a mobile side used for identity authentication and expense payment, wherein the shared power source side comprises a power source input module, an MCU control module and a power source output module which are connected by circuits; the power source input module comprises a current conversion circuit which converts mains supply into 5V2A; the MUC control module is used to control current input; the power source input module comprises a power source circuit connected to an electronic product and a communicating charging head; and after input of a correct password, the MCU control module can control the power source output module to supply power through authentication. The system provided by the invention has the beneficial effects that defects including difficult promotion and high maintenance cost of a current public charging mode can be solved; and a la