The testing method of index, at present, that the enterprise has been employing has existed lack scientific nature. The paper is aimed at this problem launching an investigation and has created appraisal method of the table made by crossing. The paper has perfected the technological comprehensive appraisement index system of economic benefit appraisal. When we choose appraisal index(variable),we attempt introduction of the soft index. This method has been proved by T-testing way that indicates the chosen indexes have strict representative nature and based on classify to appraise technological economic benefits in an enterprise. We can understand phenomenon about production and technology more deeply. It is a blazing new trail comparison with former those were used several kinds of traditional method, such as index calculated, mathematical model and chart illustration.