The present specification relates to a HMD device providing a notification and a method of controlling therefor. According to one embodiment, the method includes the steps of setting a sleep event, wherein if a sleep signal is obtained, the sleep event is set in the HMD device and wherein the sleep event indicates that a user of the HMD device is in a sleeping state, receiving first location information, obtaining a sleep event release signal, receiving second location information, wherein movement information of the HMD device of the first location information is reflected on the second location information and providing a notification on the second location information of the HMD device.