When it comes to posters, people will firstly associate them with product advertisements, theatre advertisements, film and television advertisements as well as previews of exhibitions, etc. Meanwhile, public welfare posters, which are in line with the advancement of the society, have gradually taken up some of the forms of posters.

　　The role of posters as a promotional business activities is very obvious, therefore, how to make consumers through the poster of publicity and produce the desire to buy goods is the problem that the poster designer needs to think carefully.

　　As a medium for disseminating information, it is an important function of posters to guide the public to create memories and to make suggestions and observations to the public.

　　The informative, artistic and individualistic requirements of posters are quite different from the functions of road signs and markings. Posters have to match the needs of the times and society, and reflect all aspects of history, society, life and culture.

　　Why are posters so important?

　　Nowadays, we can often see poster exhibitions, poster competitions or international poster biennials being held in various forms all over the world.

　　Poster works have also become the contents of many art museums' collections and exhibitions, and all kinds of poster exhibitions and exchanges have been highly evaluated by social citizens and experts, and there has been unprecedented support and attention to poster-related activities.

　　Why is it that we now see poster exhibitions being organised all over the world every year and why is there so much interest in organising them all over the world?

　　Here, the biggest reason is that posters are made of paper, which is very easy to transport and at the same time quite cheap to produce.

　　All you need is a sheet of paper of various sizes and a cheap writing instrument to fulfil all the conditions for making a poster, which is a simple and easy-to-make promotional medium, but does not detract from the good effects of communication.

　　As posters are a true record and display of the social situation, posters do not lose their glamour with the loss of time, but rather there are many posters that become more and more desirable and valuable to preserve as they age. Many posters convey the needs of society, but also for the popularity, beauty and artistic pursuit of the designers have poured their hearts, which are for the future development of the role of reference and reference.

　　At the same time, for scholars who study the development of society for a certain period of poster research, is also indispensable, which is the greatest value and charm of the poster, the same poster also has the idea which language cannot convey.

　　The Development of Posters

　　The heyday of the poster was in the 1960s of the 20th century, when the need and desire to use posters was particularly strong in society due to the industrial revolution and rapid economic growth in countries around the world. At the same time, ideological movements took place in many countries, so the use of posters for propaganda became more prominent.

　　As the world enters a period of full economic development, people expect posters in business promotion that cannot be replaced by other media.

　　Today, due to the development of multimedia, the role of posters as business promotion is not as important as it was at the beginning.

　　Good posters express feelings, ideas, thoughts and modelling that can communicate clearly what people cannot see clearly, show social concern with simple reproductions, show the characteristics of the concern, convey ideas and content.

　　The initial form of posters also started from prints, and then developed through a small number of printing techniques such as woodblock prints, copperplate prints, lithographs, etc. Therefore, the initial form of posters also had the participation of painting techniques, and from this point of view, posters also have the collector's value like prints.

　　Entering the 21st century, with the emergence and progress of a variety of electronic goods, computers have become smaller and more multi-functional machines, especially the popularity of smart phones, people in the understanding of the information needs of the community, but also break the traditional paper media monopoly on the transmission of information to the network, smart phones can understand the social information of the new century. As a poster of paper media, it is also facing a great challenge.

　　What does the future of posters?

　　As the information played by moving images far exceeds that of paper posters, the presentation of posters has moved from paper media to mobile phone screens and video screens. Designers not only consider the print presentation of paper posters, but also the status of the electronic display on the screen.

　　In the face of this situation, there are new requirements for designers of posters to design and produce posters for mobile phones, the internet and the characteristics of electronic screens.

　　The fascination of posters is that the unseen world sees the world through posters, the verbal and visual content is felt.

　　The biggest advantage of paper posters is that they do not require any supporting electronic supplies, do not need electricity, this most primitive use of human beings for propaganda, but can play a good effect of conveying information, which is the greatest vitality of the poster.

　　As a paper medium for publicity, posters will always play a role in our society as long as paper exists.

　　" The Journey of Posters-- Japanese Classic Poster Exhibition" currently on display at the World Expo Museum takes "Diversity of Life and Sustainable Development" as its theme and displays Nagai Kazumasa, Fukuda Shigeo, Katsui Mitsuo I, Makoto Matsunaga, UG Sato, Masuki Aoba, Katsumi Asaba, Takashi Akiyama, Ken Miki, Kenya Hara, Manabu Mizuno, etc.(ranked in no particular order) 17 "top-notch" designers, spanning 40 years and more than 30 series , more than 80 poster design works.

　　Through the exhibition, you can not only feel the designers' thinking, interpretation and performance on different dimensions of nature, life and future; you can also appreciate the different forms of printing process and artistic interpretation.