Dear Withershin,
Thank you very much for your answer, it's means a lot.
Yes you are right that the filed from CAD will populated in PGDB after conversion, and the field as color identifier also imported to the new layer in PGDB.
The problem is, i already set up the standard color in cad layer (when the layer open in ArcMap) and it's a large mount of color symbol and save it into LYR file.
Could you brief to import the color symbol in CAD layer into PGDB layer as easy as importing symbol form PGDB layer into the other PSGD layer (in Property ---> Symbol)
Thanks,
Eko Darminto