In the process of actual combat, the PPI display is an important means of radar equipment display air situation. In order to solve a certain antiaircraft gun commander to the problem of unable to realtime access to air situation information, combined with the characteristics of some fire control system PPI information, this paper presented and designed a PPI information acquisition and representation system. This system is based on the FPGA to design a kind of soft state machine module to control the data acquisition of MAX196, hub for STM32F107 to control PPI information acquisition and transmission, using OpenGL image retrieval PPI display information. The experimental results show that the system can realtime acquisition of multichannel, multitype signals, the sampling error is small, strong realtime performance, stable performance and realize remote PPI information show, for air of longdistance information acquisition, transmission and display provides a set of feasible solutions.