In the industrial market, Linux OS has always been the most popular choice. However, Android OS actually has advantages in the smartphone market, with its rich applications and APP SDK, rapidly configurable GUI, over-the-air (OTA) updates, cuase increasing number of enterprises choosing it in recent years. This session will share how the author has deal with various types of clients using Android OS in their requirement, overcoming hardware complexity, ensuring both low-level stage integration and security, and building an Android system that allows long-term updates for clients at least 5 years.