In this study, we have developed Android temperature control system for industrial use. This system including Android platform, data server and external control unit, for communication, we used RS232 and RS485. In addition, the RS232 driver and API had been developed by NDK in this study. Therefore, the developed temperature control system could communicate between Android platform and external control unit through RS232. Compared with traditional temperature controller, the developed temperature control system has low cost, friendly user interface, database which including recorder functions, larger number for external control switches and supporting multiple types temperature sensors module etc. By summarizing all of the advantage, our developed system is suitable for industrial temperature controlling in future.