Disclosed are an early warning method and system, and a computer storage medium. According to the method, a link between a base station and a user terminal served by the base station is measured (101 a). It is determined whether to trigger to send early warning information based on at least obtained measurement information (102a), the early warning information representing that the user terminal deviates from a safe communication region, and the safe communication region being a region in which link quality exceeds a preset link quality threshold.