Fiber Bragg Grating sensor network has a wide application prospect in the structural health monitoring for large and complex structures．The research on the optimization of fiber Bragg grating sensor network is important. Research status on the optimal placement and reliability of the fiber Bragg grating network and the static load identification are analyzed. And then,the optimal placement of sensors and reliability of the fiber Bragg grating network are studied. Through the analysis of structural response characteristics,the general rules of sensors placement in structural static response parameters monitoring is proposed. Probability calculation is introduced into the FBG sensor network reliability comparison of different topologies,and numerical analysis of the FBG sensor network reliability based on several simple topologies is given.