Abstract: The present invention relates to a method and system for an emergency rescue request and loss prevention. The method includes checking an operation mode activation signal by the electronic device connected to a portable device through Bluetooth low energy (BLE) communication, activating a loss prevention mode and outputting an alarm when the operation mode activation signal that a strength of a BLE signal transmitted from the portable device is a threshold value or less and transmitting to a pre-stored contact number a message which is generated on the basis of surroundings data acquired from at least one of a camera and a microphone provided in the electronic device, activating an emergency rescue request mode when the operation mode activation signal is generated from an outside of the portable device. The method and system can also be applied to other embodiments.