This paper presents the design automatic temperature control of incubator. The heat of the incubator is caused by the heat from the heat generated by the coil inside the bulb size 60 watts of 3 tube. For the control of the temperature of the incubator is the control of the heating value of the coil of the bulb is controlled through the width of the signal pulse (PWM). The width of the signal pulse (PWM) this will be changed according to the value of the desired temperature by the control system through PID. The results showed that The system can control the temperature of the incubator in the range of 36-38 degrees Celsius and the error of the temperature was set 0.1 degrees Celsius. Also within the incubator is also installed the system used in the removal of pathogens within the air with ultraviolet light, which will help to increase the survival rate of the larvae in the egg.