Abstract: The wine quality grade evaluation is a very important work.Because the quality level of wine is a kind of classified variable,traditional regression model can’t be unable to use,but the logistic regression model can.This paper used order logistic regression to build a prediction model about wine quality grade based on the actual data of a complete investigation of the Portuguese wine.Then it applied genetic algorithm with penalty function to optimize,finding out a group of factors which get the best quality level.

Key words: Logistic model,Design of optimization,Penalty function,Genetic algorithm