1. A chemical process analysis method comprising the steps of: inputting a chemical process condition and chemical species on a spreadsheet software ( 1 ), evaluating a chemical equilibrium based on the input chemical process condition and chemical species by a software ( 4, 6 ) different from the spreadsheet software ( 1 ), simulating the chemical equilibrium on the spreadsheet software ( 1 ) based on the evaluation results, and displaying the results of the simulation on the spreadsheet software ( 1 ).