An information sending method, where the method includes receiving, by a first network device, alarm information sent by an alarm terminal; and after confirming the alarm information, generating, by the first network device, first guide information according to the alarm information, and sending the first guide information to a target terminal, so that the target terminal can respond to the alarm information according to the first guide information, where the target terminal is a terminal selected from terminals that are within same base-station signal coverage in which the alarm terminal is located, or the target terminal is a terminal selected from terminals whose distances from the alarm terminal are less than a threshold. The present invention further discloses a corresponding network device and terminal.