A micro-hole structure fiber Fabry-Perot (FP) cavity is fabricated using an excimer laser to process a micro-hole in single mode fiber (SMF). And the theoretical and experimental research of temperature response characteristics of the FP cavity is performed. Research results show that when the temperature of external environment changes, the FP cavity length and the refractive index of medium in the cavity will change, which will lead to sensor output spectrum shifting. By observing the shifting of the peak or valley values of spectrum, the sensing inspection of environment temperature can be realized. Experimental results show that spectrum shifts to short wavelength gradually with the increasing of temperature. The wavelength shifting is linear with the temperature changing, and the corresponding temperature sensitivity and linearity are -0.152 nm/℃ and 98.8% respectively. The micro-hole structure fiber FP temperature sensor has the advantages of simple structure, low cost and good practicability, and it can meet the needs of different temperatures. The research results can provide a reference for the application of this device in sensing.