The invention provides an electric vehicle charging information processing method, an electric vehicle charging information processing device, a charger and an electric vehicle, wherein the electric vehicle charging information processing method, the electric vehicle charging information processing device, the charger and the electric vehicle relate to the technical field of electric vehicles. The electric vehicle charging information processing method comprises the steps of determining a charging information feedback item which corresponds with a current working state according to a plurality of working states that are set by the charger; acquiring charging information which corresponds with the charging information feedback item according to connection state information of the charger with an AC charging pile and a battery management system (BMS); and uploading charging information to a CAN bus, thereby determining a fault reason when a charging fault occurs. The electric vehicle charging information processing method, the electric vehicle charging information processing device, the charger and the electric vehicle settle a problem of high difficulty in fault examination when a charging problem occurs in an existing charging system.