The angle-dependent characteristic of electromagnetic (EM) scattering from photonic crystal with the microstructure of morpho butterfly′s wing is investigated. The optical scattering properties are analyzed with the simplified model for surface microstructure of morpho butterfly′s wing and finite difference time domain (FDTD) method. Furthermore, the influence of structural parameters on angle-dependent characteristic is studied. The reasonable explanation is presented for the angle-dependent electromagnetic scattering mechanism and its application in the stealth design of military targets are also discussed.