This paper focuses on nanotechnology and its relative applications in electric vehicles. The main parts of the article explain the role of electric vehicles in affecting the markets nowadays. The purpose is to give a direction for developing electric vehicles for future commercial use and suggestions for correcting some problems during the expansion of the electric vehicle markets. Applications of nanotechnology on cars have already developed and continued quickly. Nanotechnology helps a lot more for electric vehicles due to the advanced technology used, and there are still many problems faced by electric vehicles. The following part discusses the applications of nanotechnology on electric automobiles and the advantages of using the advanced method to improve the sales of electric cars. The applications are shown in various aspects, from car components inside car tires to the coating process of painting. The former two parts focus on the merits brought by nanotechnology. In the coating part, the theory of coating protection is discussed minutely. Another main part of the article is related to some challenges faced by the electric automobile industry nowadays, which require much more effort for manufacturers to fix the problem. Batteries and costs of cars make the electric car industry further succeed.