The oven is commonly used equipment in the printed circuit board (PCB) process. Whether it is after printing ink, after welding, or after applying protective paint, the semi-finished products need to be sent into the oven to be dried at an appropriate time and temperature. The traditional PCB baking process is manually controlled by personnel. If the an improper operation or input error, it is possible to destroy the entire batch of semi-finished products. Moreover, the traditional equipment is not connected to the computer, and there is no complete baking record to trace back to find the problem.