The design is a multifunctional sanitation vehicle, which is an improved design based on TRIZ's innovative theory. There are two fog guns in different working directions at the rear of the sanitation vehicle, which can reduce dust and haze in streets, construction sites and other places, and can kill insects and extinguish fire, disinfect and prevent epidemic in forests and epidemic-stricken areas. The intelligent water tank can prompt the water level and warn the vehicles behind. The filtering system for taking water can take water; the predecessor of the car can install tools in winter to achieve the purpose of snow removal with the functions of pushing, sweeping and blowing. Although the design is only a simple theoretical application and the shape is not good, it is also the inspiration I got in a modeling exercise to improve the design. The work won the first prize in the provincial industrial design competition and the finalist in the national competition. The second prize of the national three-dimensional innovative design competition; It was shortlisted for 6 provincial and above awards such as Wenzhou International Design Biennale. If there are any deficiencies, please understand.