Has made a water temperature controller in the red lobster tank. The purpose of this study was to study and design a red lobster raising tank to be suitable for the raising conditions. From the experimental results, it was found that the efficiency of the water temperature controller The temperature control is relatively stable, but the temperature may increase or decrease somewhat depending on the weather conditions and the experimental environment, including the duration of the experiment. In conclusion, the air temperature is directly proportional to the water temperature.