At the beginning of 2017, a pre-research project was done for Asustek. At that time, the mainstream camera phones in the market were all double cameras. It was not until the end of 2017 that Huawei's P20Pro went on the market for three cameras to become the mainstream. The development of the design is based on the arrangement of rear three cameras. How to layout can not only reflect the sense of professionalism but also make maximum use of the motherboard space. The vertical placement of the three cameras in the upper left corner of the mobile phone is our final layout. In order to emphasize the center of the back vision, the fingerprint is also designed to be placed on the side. The process of glass etching is used to enhance the functionality of photographing. Some of the three-camera mobile phones that went on the market later basically used this method. The design under the premise of high integration of mobile phone devices is actually a process of design from the inside to the outside. At the beginning of the design, the designer's sensitivity to the stacking space and the combination of aesthetic accomplishment largely determine the effect of the final product.