The invention relates to a control device and a control method for an injection moulding machine, and aims to provide a temperature synchronizing system and a temperature synchronizing method of all sections of charging baskets of the injection moulding machine. The system comprises a plurality of electric heaters arranged at all section positions of the charging baskets and temperature sensors arranged on the corresponding positions. Each temperature sensor is connected with a temperature setting module through signal wires; the temperature setting module, a temperature synchronization controlling module and a PID controlling module are connected in sequence through signal wires; and the PID controlling module is connected with the electric heaters through signal wires. The system and the method can quickly control each section temperature to reach a set value simultaneously under circumstances that the temperatures of all the sections of the charging baskets of the injection moulding machine have different set values or the situations of heat dissipation are different. The system and the method can control each section of heater to work by obtaining the control output of each section after detecting errors between the temperature set value and the actual value of each section of charging basket in real time so as to realize the accurate temperature control to each section and achieve the effects of making the temperature of each section of charging basket of the injection moulding machine simultaneously and quickly reach the set temperature.