A novel fiber-optic sensor consisting of a long-period fiber grating (LPFG) and a Fabry-Perot (F-P) interferometric sensor is proposed and demonstrated for simultaneous measurement of high-temperature and strain. The LPFG and fiber F-P sensor form the sensor in cascade. The LPFG written by high frequency CO2 laser pulses is used for high temperature measurement while the F-P sensor fabricated by 157 nm excimer laser pulses is used for strain measurement. Such combined fiber-optic sensor can stand for high temperature of 500 ℃ and achieve precise measurement of strain under high temperature environments simultaneously.