This invention discusses on the power source of adapter. Its focus is a TYPE C PD intelligent converter which is equipped with a connecting device and a microprocessor used to set and save the information of electric equipment; the microprocessor links up with TYPE C PD adapter via the connecting device, and receives the list of TYPE C PD adapter's voltages and corresponding currents offered by CC wire broadcasting; the microprocessor is used for the communication of the TYPE C PD adapter so that TYPE C PD adapter can output the voltage and current required by the electric equipment. The TYPE C PD intelligent processor can address the problem about the compatibility between the new and old products in the promotion and application of TYPE C, and reduces the inconvenience caused to users who need to buy and carry multiple USB cables or adapters with them.