To gather the operation state of automatic sapphire crystal growth in real time, this paper designs a monitoring system based on IOT Android development platform. The Android mobile device as a client receives the data from the PC server and achieves the function of data visualization for real-time parameter monitoring, including heating power, voltage and current, cooling water temperature, rotational speed, crystal weight and growth speed and so on. Firstly, the monitoring needs of Sapphire Crystals Growth is introduced in the paper, and then the composition of the system and the design of each module's functions are described in detail. Finally, using the development method of SQLite, Socket communication and others, the client for Sapphire Crystals Growth based on IOT Android platform are designed and implemented.