The essence of customer satisfaction evaluation is a process of quantitative analysis, that is, numbers reflect customers' attitude towards the attributes of the tested objects, so it is necessary to quantify the evaluation indicators. Customer satisfaction measurement is about customers' views, preferences and attitudes towards products, services or enterprises. It is difficult to understand the attitude of customers through direct inquiry or observation. Using some special attitude measurement techniques to quantify will make those "attitudes" that are difficult to express and measure not only objective but also convenient. The basic tool used in this attitude measurement technology is the so-called "ruler". The design of the scale includes two steps. The first step is "assignment", which assigns different values to different gesture features according to the set rules. The second step is "positioning", which arranges or forms a sequence of these numbers, and positions them on this sequence according to the different attitudes of the interviewees. The attitude characteristics expressed by numbers in the scale have two purposes. First of all, figures are convenient for statistical analysis; Secondly, numbers can make the attitude measurement activity itself simple, clear and definite.