As for how to calculate the restaurant's passenger flow, it was misleading to say that "the restaurant's passenger flow can be known through sales data". We know that sales data and odd numbers only come from customers who have already made a deal, but passenger flow does not mean that every passenger flow will make a deal. It may be because the restaurant is too busy, some passengers leave without spending too long, or a customer spends more than one. Therefore, the sales documents cannot be used as the basis for the restaurant to calculate the passenger flow.

Most restaurant owners, in order to know how many passengers there are every day, specially arrange statisticians to make visual statistics at the entrance of the restaurant. For example, at the latest 1 1: 30, the statistics will start at the entrance of the restaurant until13: 30; Dinner time is counted from 17: 30 to 20:30 every day, five hours a day, four or five times a week. It is not easy to ensure the accuracy of the data. In this way, this method of manual statistics will cause a lot of labor costs in the long run, and secondly, long-term work will cause staff to be unable to concentrate because of fatigue, leading to frequent mistakes and omissions.

Therefore, restaurants need a long-term, effective and high-precision passenger flow statistics system. Choose a mainstream intelligent passenger flow statistics method. By installing a passenger flow statistics camera on the ceiling above the entrance of the restaurant, it will keep 90 degrees vertical and directly face the ground. When a customer passes through the system, it will automatically identify the human characteristics, thus realizing automatic passenger flow statistics. The accuracy of passenger flow counter is as high as 95%. Compared with manual statistics, the one-time input cost is higher, but the later labor cost is reduced, and the reliability and accuracy of its data are also guaranteed.

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