The invention discloses an electric vehicle and a control system thereof. The system comprises a DC/DC converter, a motor driving circuit connected with a motor for driving the motor, a heating control circuit connected with a PTC heater for controlling the PTC heater, and a control panel including a controller having a DC/DC converter control function, a motor control function and a heating control function, wherein the controller is respectively connected with the DC/DC converter, the motor driving circuit and the heating control circuit, and is used for controlling the motor driving circuit, the DC/DC converter and the heating control circuit, so that the connection between electric part hardware and connectors can be reduced, the software integration is realized, the utilization rate of the controller and other hardware circuits is increased, the whole vehicle reliability is improved, the cost is effectively reduced, the system volume and weight are reduced, and the whole vehicle space layout is optimized.