Wormlike chain model is one of so far the best theoretical models for the semiflexible biological polymer

liquid crystal polymer and conjugate polymer.The chain length is in the same length scale with the persistent length of semiflexible chains.In this condition

the orientation of bonds becomes important for the conformational statics and the in-extendable constraint decrease number of possible conformation of the chain.Structure factor characterizes the density correlation in different length scales

which can be obtained by both scattering experiment and theoretical computation.Generally

it is hard to compute the structure factor of wormlike chain model exactly

because it has the degrees of freedom in both positional and orientational space.This strangles the development of theory based on wormlike chain model

especially

applying Gaussian fluctuation theory on the stability analysis of ordered systems.In this review

the commonly used approximated formulations of structure factor of wormlike chain model are introduced and the development on predicting the structure factor exactly.Through analyzing the scaling relation in different wavenumber regions

the multi scale properties of wormlike chain model are well demonstrated.