In this research, a few paints in the shipyard were selected and analyzed for the component and ozone production in marine paint using TVOC and GC/FID, ozone generation index (MIR, POCP) to establish measures of $VOC_s$ effectively. The concentrations of TVOC ranged between approximately 300~400 g/L and 400~500 g/L, respectively and these showed 37% of whole. Our results indicated that the main constituents of marine paints were m,p,oxylene (49%), ethyl benzene (10%), toluene (8%) and 2-propanol (5%). It was also found that xylene concentration have relatively higher impact on ozone generation. The types of paints were also investigated for their potentials. The biggest contributor was the 1 Pack Finish paint. The rest is, in their contributing order, 1 Pack Finish paint, 2 pack Finish paint, Anti-fouling paint, 2 Pack A/C paint, Ballast paint and 1 Pack A/C paint.