The optical fiber grating sensor comprises: a groove in shell with one side formed a drawing-off port outward, and the optical fiber grating arranged in the groove with ends drawing-off the shell. The corresponding portable electric equipment temperature detection system comprises: a broadband light source connected with in turns an optical isolator, the first outlet of an optical coupler and an optical connector; the second outlet of the couple connected with a microelectronic signal demodulation device and a signal processing system; and the fiber grating sensor in ring cycle network. This invention is fit to real-time detection, improves power supplying reliability and the reliability management. |