The invention discloses a payment system for an electric car charging pile. The payment system is characterized by comprising the processes as follows: electric energy is fed to an on-board charger by a public supply network through an electric energy metering module and a main contactor in sequence; electric energy metering information is fed to a main control module by the electric energy metering module; the main control module controls on/off of the main contactor; the main control module is connected to a human-computer interaction module, a network payment module and a card reader for payment management respectively, so that various payment requirements of users are met. By the structure and the method, the payment system has the advantages that (1) inconvenience caused by a single cash payment mode is avoided; (2) the user of an electric car can have a plurality of selective payment modes; (3) unlimited charging of the electric car at different places is achieved, and the battery lifetime of the electric car is prolonged; (4) the adopted network payment is time-saving and simple.