High entropy alloys(HEAs) are defined as solid solution systems consisting of at least 5 or more principal elements. Therefore, HEAs are expected to have unique properties such as severe lattice distortion, sluggish diffusion, and low stacking fault energies. It has been reported in many studies that there are several factors affecting the structural or mechanical properties of HEAs, such as atomic size, modulus, mixing enthalpy, and electronegativity of principal components. Hence, it is essential to find simple factors controlling these properties of HEAs to create useful design strategies for HEAs. In this research, we measured some simple atomic bond characters of design-intended FCC alloys from single elements to HEAs with XAFS(X-ray Absorption Fine Structure) measurement. By comparing the bonding characteristics with mechanical and physical properties of HEAs, we propose a relationship between structural factors and distinct properties of HEA leading to a new design strategy for new generation of HEAs.