The invention discloses an intelligent electric power load control system and a control method. The intelligent electric power load control system comprises an intelligent controller, an electric heating load terminal controller, a refrigerating load terminal controller, and a main incoming line measurement module. The main incoming line measurement module, the electric heating load terminal controller and the refrigerating load terminal controller transmit a detected current value, a detected voltage value and a detected power value to the intelligent controller. The intelligent controller is used for calculating a power control value, and sending out control signals. The electric heating load terminal controller and the refrigerating load terminal controller are used for receiving the control signals, and then respectively controlling an electric heating load and a refrigerating load. According to the invention, a user can effectively manage the electric heating load and the refrigerating load, and the electric charge expenditure of the user in the peak period is reduced. The stability of the power grid is guaranteed. A power supply enterprise can master the load condition of the user and figure out loads for regulation and control. The accurate load prediction is carried out, and the operation cost of the enterprise is reduced.