System for providing caution-service for prevention against disasters

Provided are a warning generating device for providing a warning service to prevent disasters, a user terminal to receive a service, a warning generating system, and a method for providing a warning service to prevent disasters. In particular, the warning generating device for providing a warning service to prevent disasters comprises: a transceiving unit to receive sensing information from one or more sensors which are installed in the warning generating device or at a remote site, and transmit warning information associated with an event to a terminal to receive a warning when the event occurs; a data collecting unit to collect device information including location information of a user terminal according to time conditions set by the user terminal; and a data processing unit to determine whether there is the event based on the sensing information and determine whether the user terminal corresponds to the terminal to receive the warning based on the location information.