The methods about external deformation monitoring of dams，tunnels or other structures become more and more mature. But it is difficult to monitor internal deformation sometimes，or such monitoring is very expensive and the accuracy is not high because of the limitations of the electric sensors，GPS and other applications. In order to solve these problems，a remote control deformation monitoring system is designed based on the Fiber Bragg Grating(FBG) with the temperature compensation，which adopts the demodulation method of the tunable matching fiber grating. The test results show that the measurement resolution is 100 nm and a nonlinear error is 150 nm. The method is feasible，effective and with low cost.