  I will review the tips learned from panchromatic modeling of active galactic
nuclei (AGNs), based on our recent work to study the relationship between AGN
and star formation (SF). Several AGN SED models are compared, and signifficant
AGN contribution is found in the IR luminosities and corresponding star
formation rate (SFR). I will review the AGN-SF relation and how different
parameters and sample selections affect the observed correlation. I will then
report on the constant ratio discovered between the SFR and the black hole mass
accretion rate (BHAR), and their implications on the gas supply and galaxy
formation history of these systems. Caveats and important questions to answer
are summarized at the end.
