Charging control method and circuit for alternating current cost control charging gun as well as charging gun

The invention relates to a charging control method and circuit for an alternating current cost control charging gun as well as the charging gun. The method comprises the following steps that the charging gun is connected to a charging car and a charging source; intelligent terminal equipment establishes mapping with the charging gun; the intelligent terminal equipment sends charging gun information to a remote server, and the remote server checks a user account state corresponding to the charging gun; the remote server binds the charging gun and identity of an intelligent terminal user and affirms charging; the user selects a charging mode, after the remote server affirms, the remote server sends account balance information of the user to the charging gun; the charging gun opens a charging control lock and starts charging an electric car; a master controller of the charging gun reads charging data of an electricity meter and deducts the user balance; and the charging ends, and the remote server updates the cu