This paper analyze the multiplier-accelerator model of the macroeconomy farther, which was introduced by Keynes, applying the theory and idea of the signal and system.

• 本文在充分研究凯恩斯提出的宏观经济乘数-加速模型的基础上上借助信号与系统的概念和理论,对模型进行了深入的研究和分析。