The controller is mainly used in hot air convection oven. It is designed with high-speed CPU chip. The system has the advantages of fast response, accurate temperature control, convenient data storage and simple setting and operation. Heating control adopts advanced PID algorithm control, baking time adopts countdown control, intelligent hot air management, and advanced functions meet the needs of multi-level users. The controller output is the relay switching value output, and the panel is provided with LED light-emitting tube for indication during action. It can simply and clearly indicate the working state of the machine, so that users can work more safely and conveniently.