Fire reminding method and system

The invention relates to a fire reminding method and system. The method comprises the following steps: receiving information sent by fire detectors arranged in a building, wherein the information comprises fire detector identification and fire parameters; judging whether the fire parameters are larger than a threshold value; if so, determining the position of the fire point according to the fire detector identification; and sending a fire reminding message to a portable positioning device in the building, wherein the fire reminding message comprises fire alarm and position of the fire point. When fire happens, a user of the portable positioning device can know that the fire happens in real time and determine the position of the fire point according to the fire reminding message, and can avoid the firing place and select a safe escape path during escaping.