1 INTRODUCTION  
2 MODEL  
2.1 Cosmological Simulation with Dust Evolution  
2.2 Estimation of Dust Extinction Optical Depth  
2.3 Stellar SED and Dust Emission  
2.4 Derivation of Dust Temperature  
2.5 IRX $\beta_{\mathrm{UV}}$ Relation  
3 CALIBRATION AND TESTS  
4 COMPARISON WITH THE STUDIES SAMPLE  
5 DISCUSSION  
5.1 Effect of Spatial Resolution  
5.2 Geometry of Dust Distribution  
5.3 Variation of Extinction Curves  
5.4 More Dust Heating by AGN and Massive Stars at High Z?  
6 SUMMARY AND CONCLUSIONS