The design introduces the philosophical view and mathematical method of “system whitenization” in gray system into the field of user experience measurement, and designed a new user experience measurement method, which breaks through the original macro measurement method, realizes the personalized measurement combining product service characteristics tightly, and improves the guiding role of user experience measurement tools on Internet product iteration. “Didi Freight”, Compared with v1.0, the total score of user experience has increased by 4.2%.