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In view of the current market, the spectrum processing display equipment is bulky and inconvenient to carry. Based on the control and networking technology of Android system and intelligent mobile terminal, this paper designs a APP which can display and control the signal on personal mobile phone. The use of Android powerful mobile phone operating system, signal detection and processing more convenient, efficient and effective, but also the software can be upgraded to add new procedures, so that its function is more perfect. The display control part of the spectrum meter is easier to be maintained and replaced, and the production cost is reduced. Through testing, the validity and feasibility of the APP have been verified.