The ice compositions of a protoplanetary disk can be explored by freshly sublimated Complex Organic Molecules (COMs) in an eruptive young star. We performed an ALMA spectral survey toward an eruptive young star, V883 Ori in band 6 to investigate the chemical characteristics of a protoplanetary disk through the project, ASSAY (ALMA Spectral Survey of An eruptive Young star, V883 Ori ). 70 molecular species from simple molecules to COMs including various isotopologues have been detected. We adopt two independent methods to derive column densities of molecules: LTE spectral fitting analysis and rotation diagram. According to our examinations, robust column densities can be derived only by optically thin lines; thus, covering multiple optically thin lines of a COM is critical to study the abundances of COMs. The comparisons with a class 0 hot corino, IRAS 16293-2322 and comet, 67P/Churyumov-Gerasimenko indicate that the detected COMs in V883 Ori are more abundant by about an order of magnitude than those of IRAS 16293-2322 but has similar abundances to those in comet 67P/Churyumov-Gerasimenko, hinting the chemical evolution from the envelope to the disk.