An online forum was an online discussion platform where users could post their opinions, reply to comments, and discuss and communicate with other users. The research and development significance and background of the online forum can be discussed from the following aspects: 1. Social needs: With the popularity of the Internet, people increasingly need to establish and maintain interpersonal relationships on social platforms. As a special way of socializing, online forums could meet people's needs in this regard. 2. Information acquisition: The online forum can provide a relatively open and free information acquisition platform. The users can search and obtain various information according to their own interests and needs. Strong interaction: online forums allow users to freely discuss and interact with others. This interaction can enhance the user's participation and satisfaction. 4. Business model: The online forum can become a business model for commercial organizations to achieve commercial profits by providing advertising, membership services, e-commerce and other services. The research and development background of online forums was mainly related to social interaction, information acquisition, interaction, business model, etc. These requirements and characteristics provided a broad space and development opportunities for the development of online forums. With the continuous development and popularity of the Internet, online forums would become one of the important tools for people to socialize, obtain information, and communicate.