Abstract: Utilizing the cloud, AI (Artificial Intelligence) technology combined with the technologies of the 4th Industrial Revolution. AI speaker in IoT (Internet of Things) environment is equipped with speech recognition technology. AI speaker is a tool of voice and music transmission, personal privacy and contents of business use a cloud, AI technology to have a kind of business mechanism. With the popularization of AI speakers in the IoT environment, privacy and work-relatedness are increasing. If a hacking attack occurs on the AI speaker and Bluetooth, the user will not know whether or not his or her device is hacked. In this study, we study the vulnerability and hacking methods of AI speakers in IoT environment and study the security methods for AI speaker and Bluetooth hacking attacks.