The present disclosure provides a multi-metabolite platform using one or more metabolite selected from a group consisting of tryptophan, homoserine, fatty acid (16:1), fatty acid (18:0), fatty acid (18:1), fatty acid (18:2), fatty acid (22:6), phosphatidylcholine (PC) (34:2), PC (34:3), lysophosphatidylcholine (lysoPC) (16:0), lysoPC (18:0), lysoPC (20:3), lysoPC (20:4), lysoPC (22:6), monoglyceride (18:1/0:0/0:0) and sphingomyelin (d18:2/16:0) as a biomarker, which can diagnose acute coronary syndrome as well as the symptoms occurring prior to the onset of the disease simply and accurately through in-vivo level analysis.