The paper describes the current technology and different application architectures on some civil airplanes about on-board information system, including the different characteristics of each architecture. The paper also studies the different solutions from the following factors: custom objective, mature aircraft vs. on-going aircraft, separate LRU architecture vs. integrated architecture, human-machine efficacy factor and so on. And based on the general philosophy of on-board system development, the paper gives the preliminary prediction for future architecture about on-board information system.