"Snails climb step by step with heavy shells on their backs." As we all know, snails can climb along vertical walls or even glass without claws or other climbing objects, even if there is something hanging on the shell behind them. What a great skill this is. If there is a device that can climb along the wall like a snail, how much will it do? If there is an accident in a high-rise building, the ladder below can't reach it, and the helicopter above can't get close. This kind of equipment can solve the problem. This kind of equipment is needed in many places. Let's study how snails achieve this function. It secretes a kind of mucus and sticks itself to the wall. At the same time, mucus fills the gap between the snail's body and the wall, and atmospheric pressure also helps the snail. Snails use the wrinkles under their bodies to climb up before the mucus solidifies. We now have various adhesives and various track structures. Combining these technologies, the movement of bionic snails will be of great use.