In the process of real estate investment environment evaluation,there are a lot of evaluationindex,and the evaluation process is complicated.This article use the method of principal componentanalysis in the process of evaluation indicators of the principal components,reduction of the evaluationindex,improves the efficiency of evaluation.In the process of empowerment of evaluation index,principal component analysis of variance method can＇t make the weight value to the contribution rate ofempowerment.In order to ensure unity weighting information,the information entropy principle is giventhe weights of objectivity and reasonable assurance indicators.Finally,a case with indicators improvedand the index weight of scheme determined was implicated for comprehensive evaluation.Theresults verify its rationality.