As a special way of human intuitive contact, symbols are not only ubiquitous in social activities and production activities, but also for the fundamental interests of the country, social groups and even individuals. It is increasingly showing its extremely important and unique role. For example, the national flag and national emblem, as symbols of a country's image, have special meanings that are difficult to express accurately in any language or writing. Public place signs, traffic signs, safety signs, operation signs, etc. It plays an intuitive and quick role in guiding people to carry out orderly and normal activities and ensuring the safety of life and property. Trademark, store logo, factory logo and other special signs have great practical value and legal protection for developing economy, creating economic benefits and safeguarding the rights and interests of enterprises and consumers. Almost all major events, conferences, sports meetings, postal services, finance and trade, institutions, organizations and even individuals (seals and signatures) at home and abroad have signs showing their own characteristics. These signs play the role of communication, exchange and publicity from all angles, promoting social, economic, political, scientific and cultural progress and protecting their respective rights and interests. With the increasing frequency of international communication, the characteristics of intuitive, no image and no language are extremely beneficial to international communication and application. Therefore, the international logo has been rapidly promoted and developed, becoming one of the most effective means of visual communication and an intuitive communication tool for human beings.