简略地回顾了人工智能的历史和发展现状。分析比较了人工智能两大领域：符号主义和连接主义，同时介绍了各个领域的主要原理和方法。着重回顾了深度学习的历史、复兴的原因和主要的应用。

This work gives a brief review of the history of artificial intelligence, and analyzes the current status of the field. The main principles and methodologies of the major branches in AI included symbolism and connectionism. Furthermore, the history, and booming reasons and major applications of deep learning are introduced as well.