The invention discloses a sleep aid robot. The sleep aid robot comprises an analysis processing system and a bed board, wherein a cover lid is arranged above the bed board, one side of the cover lid is movably connected to one side of the bed board through a hinge, one end of the top of the bed board is provided with an inflatable pillow, the top of the inflatable pillow is uniformly and fixedly connected with a plurality of brain wave chips, and the bottom of the bed board is provided with an adjusting device. The provided sleep aid robot and a control method thereof can adjust the environmental conditions when people sleep, so that the temperature and humidity of the sleep environment reach the level most suitable for human sleep. An analytical processing system is arranged to automatically analyze the most suitable environmental conditions when a user sleeps, thereby facilitating the improvement of the sleep quality of the user.