The working principle of ejector combustion technology and the difference between regenerative ladle roaster and ejector ladle roaster were introduced. The structure of ejecting ladle toaster system, the control strategy of ladle temperature and the design of hardware and software were described. The temperature control process of the oven adopts the time proportional integral control method, that was, the optimal heating process was first set in the system. In operation, the size of proportional valve opening can be adjusted by the PLC control system to make the temperature of the ladle conform to the optimal heating process, so as to ensure the temperature control speed was fast and the precision was high and realize the real-time online baking of the ladle. The results show that the control system works stably and the energy saving is increased obviously.