A high-temperature analysis method for qualitative and quantitative analysis of an additive in a polymer, comprising the steps of: (i) dissolving a polymer sample containing an additive with 5 to 40 mL of a first solvent relative to 1 g of the sample; (ii) precipitating the sample of the solution of (i) with 10 to 100 mL of a second solvent relative to 1 g of the sample and filtering the precipitate to separate into the sample and a solution containing the additive; and (iii) performing qualitative analysis and quantitative analysis of the solution containing the additive simultaneously by using a high throughput gas chromatographic system, the high throughput gas chromatographic system comprising: an inlet through which a sample is injected a column to which the sample injected from the inlet is introduced; a splitter for distributing the sample introduced into the column, to a flame ionization detector and a mass spectrometer; a first restrictor which is a path through which the sample moves between the splitter and the flame ionization detector; a second restrictor which is a path through which the sample moves between the splitter and the mass spectrometer; the mass spectrometer for qualitative analysis of the sample; and the flame ionization detector for quantitative analysis of the sample, wherein the high throughput gas chromatography system is configured to simultaneously perform qualitative analysis and quantitative analysis of the sample. (i) dissolving a polymer sample containing an additive with 5 to 40 mL of a first solvent relative to 1 g of the sample; (ii) precipitating the sample of the solution of (i) with 10 to 100 mL of a second solvent relative to 1 g of the sample and filtering the precipitate to separate into the sample and a solution containing the additive; and (iii) performing qualitative analysis and quantitative analysis of the solution containing the additive simultaneously by using a high throughput gas chromatographic system, the high throughput gas chromatographic system comprising: an inlet through which a sample is injected a column to which the sample injected from the inlet is introduced; a splitter for distributing the sample introduced into the column, to a flame ionization detector and a mass spectrometer; a first restrictor which is a path through which the sample moves between the splitter and the flame ionization detector; a second restrictor which is a path through which the sample moves between the splitter and the mass spectrometer; the mass spectrometer for qualitative analysis of the sample; and the flame ionization detector for quantitative analysis of the sample, wherein the high throughput gas chromatography system is configured to simultaneously perform qualitative analysis and quantitative analysis of the sample. an inlet through which a sample is injected a column to which the sample injected from the inlet is introduced; a splitter for distributing the sample introduced into the column, to a flame ionization detector and a mass spectrometer; a first restrictor which is a path through which the sample moves between the splitter and the flame ionization detector; a second restrictor which is a path through which the sample moves between the splitter and the mass spectrometer; the mass spectrometer for qualitative analysis of the sample; and the flame ionization detector for quantitative analysis of the sample, wherein the high throughput gas chromatography system is configured to simultaneously perform qualitative analysis and quantitative analysis of the sample.