AbstractIn this talk, I will focus on Deep Reinforcement Learning (DRL), one of the key AI technologies. Google’s DeepMind developed a Go program, AlphaGo, that defeat the Go champion, which was thought to be not possible to happen within one or two decades. First, review Deep Reinforcement Learning (DRL). Second, classify DRL applications into three types, from board games, video games, to industrial applications. Then, present the prospective researches on DRL in the three types of DRL applications.